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Improvements

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Use graphs on p. 337 & 339 & 341 Better notes on slope! Get rid of points on graph. Instead say at 5 seconds, what s velocity? dots mess kids up cuz they ... – PowerPoint PPT presentation

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Title: Improvements


1
Improvements
  1. Use graphs on p. 337 339 341
  2. Better notes on slope!
  3. Freefall! have students determine reaction time
    with ruler. Bigger notecards would be better.
    (better later I think)
  4. Determine heights based on dropping things!

2
  • Schedule
  • Friday
  • Check review displacement graph homework
  • Displacement graph notes
  • Monday 3/11
  • Review homework graphs
  • Tuesday - No class
  • Wednesday - No class
  • Thursday
  • Return quizzes!
  • Slow glider lab
  • Friday
  • Position (displacement) graph quiz

3
Bell Work (on 2.1 sheet)
  • Skiers have set world records by reaching speeds
    of over 240 km/hr. How many miles per hour is
    this? (1 km 0.621mi)

4
Bell Work 3/5/14
  • Start a new BW sheet titled x, v, a
  • Calculate the density of an object with a mass of
    15.0 g and a volume of 5.0 cm3.
  • Calculate the mass of an object with a density of
    55.0 kg/m3 and a volume of 20.00 m3.
  • Calculate the volume of an liquid with a mass of
    101 g and a density of 32 g/mL .

5
What is physics?
  • the study of matter, energy, and the interaction
    between them
  • How much weight can this bridge hold?
  • How should we launch this projectile?
  • How fast can one drive around this curve?
  • What will the temperature in the room be?
  • How does sunlight heat Earth?
  • How did the universe begin?

6
  • Today you are going totakes notes on distance,
    displacement, speed, velocity.
  • So you candevelop an understanding of how to
    describe motion and solve motion problems.
  • Youll know youve got it when you can
  • Accurately complete the notes sheet questions
  • Define differentiate between distance and
    displacement
  • Define differentiate between speed and velocity

7
Distance
  • The length of the path described by an object
    moving through space
  • OR
  • Length of the path something travels
  • Units of length
  • mi, km, m, yd, ft, in, cm,
  • No / sign!
  • Ex 4.0 mi 35.0 km

8
Displacement
  • The change in position of an object
  • Distance between starting point and ending point
    of object
  • Includes direction
  • Can be negative (negative represents direction)
  • Is always a straight line
  • Units of length
  • mi, km, m, yd, ft, etc.
  • Examples
  • 4.0 miles north
  • 35.0 km _at_ 35o

9
Displacement vs. Distance
  • Similarities
  • Both measure lengths
  • Same units
  • Differences
  • Displacement has direction, distance doesnt
  • Displacement may be negative (negative direction)
  • Displacement is always a straight line

10
Displacement vs. Distance
  • The track is 0.25 mi. Thomas runs around the
    track 4 times, then collapses exactly where he
    started. What distance did he run? What was his
    displacement?

11
Displacement vs. Distance
  • Ok, now you know the difference between
    displacement and distance!
  • When were math problems or graph problems in
    here, we usually wont worry about the
    difference. Youll get into that more in
    physics.
  • Well use the variable x for both. When we did
    density, we used the variable D for density.
    It seems strange to use x for displacement, but
    thats how it is yo!

12
Rates
  • Anything measured with respect to something else.
  • Ex How quickly water is leaking from a faucet
    could be described in liters per hr (L/hr)
  • Other rates?

13
Speed
  • Rate of change of distance with respect to time
    (how fast an object is moving)
  • speed distance
  • Units of m/s, ft/s, mph, km/hr, km/s, etc.
  • Ex. 55 mi/hr 23 m/s

time
14
Velocity
  • Rate of change of position with respect to time
    (speed with direction)
  • Velocity displacement
  • Units of m/s, ft/s, mph, km/hr, km/s, etc.
  • Ex. - 55 mi/hr 23 m/s _at_23o

time
15
Speed vs. Velocity
  • Similarities
  • Both measure rate at which an object moves
  • Same units
  • Differences
  • Velocity has direction, speed doesnt
  • Velocity may be negative
  • Means its moving in the negative direction

16
Speed vs. Velocity
  • Ok, now you know the difference between speed
    velocity.
  • When were math problems or graph problems in
    here, we usually wont worry about the
    difference. Youll get into that more in
    physics.
  • Well use the variable V for both.

17
Constant
  • Constant staying the same (remember constant
    variables?)
  • Constant speed speed stays the same
  • Most things dont move with a constant speed.
  • Constant velocity velocity stays the same
  • Means both speed AND _______________ stay the
    same
  • Most things dont move with a constant velocity.

18
  • If something is moving with a constant velocity
    of 5.0 mi/hr, what does that mean?
  • How far will it travel in 1 hr? 2 hr? 5 hr?

19
  • If something is traveling with a constant
    velocity of 20.0 m/s, what does that mean?
  • How far will it travel in 1.0 s? 2.0 s? 7.0 s?
  • What equation did you use for the above?

20
Do the cow questions in your notes.
  1. A cow runs 25 m in 5.0 seconds. What is the
    cows average velocity? (show your work)
  2. The cow then runs the opposite direction with the
    same speed. Average velocity?

21
Speed
  • If you are traveling 80 mi/hr, how long does it
    take you to go 80 miles?
  • Chelseas answer

22
Instantaneous Speed/Velocity
  • Speed or velocity at an extremely short time
    interval
  • (speed or velocity at an instant in time)
  • Speedometer
  • Radar gun

23
Bell Work 10/23/14 3 min
  • Put your homework upsidedown on your desk.
  • What are two ways distance and displacement are
    different?
  • Identify which color path gives distance and
    which color path gives displacement.
  • True or False Displacement is always greater
    than or equal to distance.
  • A

A
B
24
x, t, V, or a?
  1. 5.0 mi
  2. 30.5 m/s
  3. 89 min
  4. 45 m/s/s
  5. - 15 mph
  6. 6.02 in
  7. 25 m/s2
  8. 4 hours
  9. 3 laps
  10. 10 mi/hr/s

25
  • V ? X 50.0 m t 2.0 s

26
  • V ? x 200.0 m t 2.0 s
  • V 50.0 ft/s x 100 m t ? s
  • V 2.0 m/s x ? m ? ft t 40.0 min

27
  • V 10.0 m/s X 50.0 m t ?

28
  • V 20.0 m/s X ? t 1.5 min

29
Solving speed velocity problems
  • Identify the variables
  • Units help! Include them!!
  • Convert units if necessary
  • Write the equation
  • Plug into the equation solve
  • Include units correct of sig figs in your
    answerconvert units if necessary

30
  • Monica Burns is running with a velocity of 12.0
    m/s. How long will it take her to cover the
    length of a basketball court (28.7 m)?

31
  • Blaze throws a 50.0 mph fastball. How many feet
    will the ball go in 2.0 s?

32
  • Kevin can run around the track 6 times in 10.0
    minutes. If the track is 0.25 miles around, what
    is his average speed?

33
Bell Work 10/24/14
  • Put your homework upsidedown on the desk to be
    checked.
  • David throws a 65.0 mph fastball. How many feet
    will the ball go in 2.0 s?

34
Bell Work 10/27/14
  • Monica Burns is running with a velocity of 39.4
    ft/s. How long will it take her to cover the
    length of a basketball court (28.7 m)?
  • W5SAYWoS

35
Relative Velocity
  • How fast are you going right now?
  • http//www.youtube.com/watch?vwIzvfki5ozU
  • Also deals with acceleration
  • But its perhaps over your heads
  • Monty Python Song
  • http//www.youtube.com/watch?vvIy76M-4txo
  • A little more approachable, and culturally
    significant!
  • 1 light year distance light can travel in one
    years time. (9,461,000,000,000 km or
    5,878,000,000,000 mi)
  • 6 trillion miles! (1 sig fig)
  • could also add cool solar system movement into
    this slide or near here! Maybe thatd be more
    relevant to acceleration though.

36
Relative Velocity
  • Velocity changes depending on your frame of
    reference. Everything everywhere is moving
    relative to something. A frame of reference is
    what you consider to be standing still.

37
Calculating relative velocity
  • Choose one direction to be positive. The other
    is negative. Add the velocities.

38
Relative Velocity
  • A bus is traveling at 35 mi/hr. Amber throws an
    apple at the bus driver with a velocity of 25
    mi/hr toward the front of the bus. What is the
    apples velocity relative to the bus driver?

39
Relative Velocity
  • A bus is traveling at 35 mi/hr. Amber sees Jason
    standing alongside the road. She leans out the
    window and throws an apple at him with a velocity
    of 25 mi/hr toward the front of the bus. What is
    the apples velocity relative to the Jason?

40
Relative Velocity
  • Cameron is racing Vittoria. He is behind, but
    driving at 25 mi/hr west. Vittoria is driving at
    23 mi/hr west. What is Camerons velocity
    relative to Vittoria?

41
Relative Velocity
  • Mythbusters soccer ball!

42
Optical Illusion
  • Stare long enough and youll see a giraffe!

43
Relative Velocity
  • Kennedy realizes the railroad man is going to
    catch her, and shes stolen some loot from a
    jewelry store. Still running at 10.0 mph west,
    she throws the loot with a velocity of 50.0 mph
    relative to her. How fast is the loot moving
    relative to the ground?

44
Bell Work 10/29/14
  1. Use the factor label method to convert 1 m/s to
    mi/hr.
  2. What does 2.0 m/s mean?
  3. Morgan is riding on a boat traveling at 15 mph
    north. If she runs south at 7.0 m/s, how fast is
    she going relative to the water?

45
Bell Work 10/29/14
  1. Use the factor label method to convert 1 m/s to
    mi/hr.
  2. 2.2 mph
  3. What does 2.0 m/s mean?
  4. Travels 2.0 meters each second
  5. Morgan is riding on a boat traveling at 15 mph
    north. If she runs south at 7.0 m/s, how fast is
    she going relative to the water?
  6. 15 -7.0 8 8 m/s north

46
Bell Work 2/13/12 4 minutes
  1. Put your hw on your upsidedown on the top of your
    desk.
  2. Andy is being chased by a Valentines Day
    stalker. He runs with a velocity of 7.0 m/s for
    35 s. Then he suddenly gets tired and slows down
    to 2.0 m/s for 40.0 s. How far did Andy run?
  3. What is the formula for the slope of a line?

47
Bell Work 2/14/12 4 minutes
  • n T PV
  • R
  • In the above equation, which variables are
    directly related and which are inversely related?
  • Draw an inverted stick figure.
  • It takes Cameron 3000 seconds to travel 500
    meters. How long would it take him to travel 100
    m at the same speed?

48
Bell Work 11/10/14 4 minutes
  1. Blaze throws a 50.0 mph fastball. How many feet
    will the ball go in 2.0 s?
  2. It takes Cameron 3000.0 seconds to travel 500.0
    meters. How fast did he run?
  3. Give 2 differences between displacement and
    distance.
  4. Can an object accelerate without changing speed?

49
  • Find the position and velocity at
  • 2.0 s 2) 5.0 s 3) 7.0 s
  • 4) 12.5 s 5) 15 s 6) 15.5 s

50
Bell Work 3/8/12
  1. Find the slope of the line that point A is on.
  2. Find the slope of the line segment point D is on.

c
b
d
f
e
a
g
h
51
Bell Work 3/9/14
  1. Find the slope of the line that point E is on.
  2. Find the slope of the line segment point F is on.
  3. Find the slope of the line segment point G is on.

52
Bell Work 3/14/14 5 minutes
  • Find the displacement velocity at A, B, C, D,
    E, F

2.0
Displacement (m)
1.0
0.4
53
Bell Work 10/29/14
  1. Use the factor label method to convert 1 m/s to
    mi/hr.
  2. What does 2.0 m/s mean?
  3. Morgan is riding on a boat traveling at 15 mph
    north. If she runs south at 7.0 m/s, how fast is
    she going relative to the water?

54
Bell Work 10/29/14
  1. Use the factor label method to convert 1 m/s to
    mi/hr.
  2. What does 2.0 m/s mean?
  3. Morgan is riding on a boat traveling at 15 mph
    north. If she runs south at 7.0 m/s, how fast is
    she going relative to the water?

55
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56
Bell Work 10/30/14 6 min
  • Find the displacement (position) and velocity of
    the object in the graph
  • a. 0.5 s
  • b. 2.0 s
  • c. 2.5 s
  • d. 4.0 s
  • e. 5.0 s

57
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58
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59
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60
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61
  • Today you are going topractice finding the slope
    of a line reading distance/position/displacement
    vs. time graphs
  • So you candevelop an understanding of how graphs
    describe motion learn to interpret them.
  • Youll know youve got it when you can
  • Find the displacement and velocity of an object
    using a position vs. time graph.

62
Motion Graphs
  • Very useful in analyzing how the motion of an
    object changes.

63
Getting info from motion graphs
  • 3 ways to get information
  • Read graph
  • Find slope
  • Find area under graph
  • Look at labels of the axes!
  • Let units be your guide!!!
  • STUDENTS DONT UNDERSTAND THAT VX/T IS THE SAME
    AS THE GRAPH!?

64
Position (Displacement) vs. Time Graph
  • Read X-axis to find the position (displacement )
  • Find slope for velocity
  • Faster objects steeper (or greater) slopes
  • Object not moving zero slope (flat, horizontal
    line)
  • Area under graph means NOTHING!

65
  1. Where is the object at 2.0 s?
  2. Where is the object at 2.5 s?
  3. Where is the object at 4.0 s?
  4. Where is the object at 5.8 s?

66
Finding Velocity from D vs. T Graph
  • To find the velocity of the object, calculate the
    slope of the line segment you want to know about.
  • For example Find the velocity of the person for
    the first 5 seconds of their trip.
  • Pick 2 points that are on the line segment.
    Usually, the endpoints work well.
  • Calculate the slope. Be sure to include units.
  • (0, 0) and (5, 10) are the end points.

67
Finding Slope
  • Slope rise

run
68
  • Find the objects velocity at
  • 0.5 s
  • 2.0 s
  • 2.5 s
  • 5.8 s

69
  1. Story?

70
What is the average speed of car A for the entire
trip?
71
Position (displacement) vs. time graph  Each
point on the line tells you where the object is
at each instant.
  • A straight line shows constant velocity.
  • Slope of the line gives the magnitude (amount) of
    velocity.

At Rest
Velocity
- Velocity
72
A curved line shows acceleration.
Concave-Up Concave-Down Looks like a
SMILE! Looks like a FROWN!
  • slowing down speeding up slowing
    down speeding up
  • positive acc.
    negative acc.

73
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74
Creating Graphs
  • Title at Top (y axis vs. x axis)
  • Lines and scales neatly drawn/written
  • Key (if applicable)
  • Axes labeled, including units
  • Axes scaled frequently marked
  • Scale is consistent and easy to interpret using
    lines on graph paper
  • graph is made large enough to read origin begins
    at 0,0 if appropriate

75
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76
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77
Time (s) Displacement (m) Velocity (m/s)
0 5
5 10
10 20
15 20
20 15
25 10
30 0
78
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79
  • Position vs. Time Graph Lab
  • Show all work for problems involving math.
  • Round to 3 sig figs
  • Precise numbers can be checked by clicking the
    mouse on the graph
  • http//users.hal-pc.org/clement/Simulations/Physl
    ets/TST/Position-Time20Graphs.html

80
Check out these applets
  • http//jersey.uoregon.edu/vlab/block/Block.html
  • http//dev.physicslab.org/Document.aspx?doctype3
    filenameKinematics_PositionTimeGraphs.xml

81
Airplane Lab
  • Today
  • Make plane
  • Make graphs
  • Start timing!
  • Tomorrow
  • Questions?
  • Monday
  • Due at beginning of class

82
Objectives
  • Identify direct inverse relationships
  • Paper airplane lab

83
Direct Inverse Relationships
84
  • Direct relationship
  • Directly across one another in equation
  • When on opposite sides of the sign, both are
    on top or both on bottom
  • If one doubles, the other doubles!
  • Inverse relationship
  • When on opposite sides of the sign, ones on
    top the others on the bottom
  • If you double one, the other is halved

85
Directly or Inversely Related?
86
Bell Work 2/25/13 5 minutes
  1. A cheetah can run 200.0 m in 6.6 s. Calculate
    the cheetah's velocity.
  2. A calf runs at 8.0 m/s. How long would it take
    to run the length of a football field (360 ft)?
    1 m 3.28 ft
  3. Identify if the velocity is positive, negative,
    or zero on the graph below. Find the velocity
    from 3.00 8.00 s.

Displacement (m)
87
Bell Work 2/26/13 5 minutes
  • A calf walks at 2.0 meters 4.0 in seconds. Find
    the velocity.
  • A boy walks 1.5 m in the negative direction in
    5.0 s. Calculate the boys velocity.
  • Find the displacement and velocity for each
    point.

2.0
Displacement (m)
1.0
0.4
88
c
89
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90
24
20
16
Displacement (m)
12
91
Bell Work 5/23/12 5 min
  • Take homework out.
  • Find position and velocity at each point.

92
Bell Work 5/23/12 5 min
  • Take homework out.
  • Find position and velocity at each point.

93
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94
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95
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96
Homework (review)
97
C
D
B
E
A
98
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99
  • Today you are going toread about distance,
    displacement, speed, velocity, completing an
    accompanying notes sheet, and review it.
  • So you candevelop an understanding of how to
    describe motion and solve motion problems.
  • Youll know youve got it when you can
  • Accurately complete the notes sheet questions
  • Define differentiate between distance and
    displacement
  • Define differentiate between speed and velocity

100
Bell Work 2/15/13 7 min
  1. 15 mL of a liquid has a mass of 30.0 g. What is
    its density?
  2. What is the formula for velocity?
  3. Brendon falls down 8.0 meters of bleachers in
    3.00 seconds. What is his velocity?
  4. Express his speed in feet per second (1 m 3.28
    ft).

101
Bell Work 3/21/13 3 min
  1. Solve the acceleration equation for Vo.
  2. Solve the acceleration equation for t.
  3. Solve the acceleration equation for x by using
    Vf xt.

102
Bell Work 2/28/13 7 min
  • Use the factor label method to convert the
    following.
  • 15.0 m ? ft (1 yd 0.914 m, 1 yard 3 ft)
  • Put the graphs below in order from fastest moving
    to slowest.

103
  • Shania is walking when she decides to sprint down
    the hallway. Starting at 3.00 mi/hr, she reaches
    a speed of 12.0 mi/hr in 2.0 seconds. Calculate
    her acceleration.

104
Bell Work
  1. What angle should you launch something to get it
    to go the furthest?
  2. The highest?
  3. What 2 angles would go the same distance?

105
Bell Work
  1. What angle should you launch something to get it
    to go the furthest?
  2. The highest?
  3. What 2 angles would go the same distance?

106
Schedule
  • Friday
  • Catapult info
  • Work on airplane labs
  • Monday
  • Turn in Airplane Labs
  • Projectile Notes
  • Acceleration
  • Tuesday
  • Acceleration
  • Wednesday
  • Acceleration Graphs
  • Take home quiz
  • Wednesday
  • Turn in take home quiz
  • Acceleration Graphs
  • Intro car activity
  • Thursday
  • Car activity!

107
  • Today you are going totake notes on and complete
    a worksheet on acceleration.
  • So you candevelop an understanding of
    acceleration and solve acceleration problems.
  • Youll know youve got it when you can
  • Accurately complete the problems questions

108
Bell Work 3/25/14 4 min
  1. Define acceleration.
  2. An object is traveling at 45.0 m/s. What does
    that really mean?
  3. An object is accelerating at 10.0 m/s/s. what
    does that really mean?

109
Bell Work
  1. Complete 1-9 on the worksheet!!! Woo woo!!!

110
Acceleration
  • the rate of change in the velocity of an object
  • 3 ways an object could accelerate?
  • What 3 controls can cause a car to accelerate?
  • All accelerations are caused by forces!
  • Examples of acceleration?

111
What does acceleration really mean?
  • A car is accelerating at 5.0 mi/hr/s.

112
Formula for Final Velocity
  • Cheyenne is riding her bike at 2.0 mi/hr. If she
    accelerates at 5.0 mi/hr/s for 4.0 s, how fast
    is she going?

113
Negative acceleration
  • Negative displacement
  • Means moved in the negative direction
  • Negative velocity
  • Means object is traveling in the negative
    direction
  • Negative acceleration
  • Means object is accelerating in the negative
    direction
  • acceleration velocity are in opposite
    directions, the object is slowing down

114
Acceleration
  • Can an object be accelerating, yet be slowing
    down?

115
What does acceleration really mean?
  • A ball is accelerating at -9.81 m/s2

116
Formula for acceleration
  • Cheyenne is riding her bike at 2.0 mi/hr. If she
    accelerates at 5.0 mi/hr/s for 4.0 s, whats her
    acceleration?

117
Formula for acceleration solved for Vf (and
everything else) Only a Vf formulas provided on
test!
  • Make equation with x and y in it solve

118
Order of Operations!
  • Make sure you put stuff in your calculator in the
    correct order!

119
Practice Problems
  • Vo 8.0 m/s Vf 20.0 m/s t 6.0 s a ? m/s2

120
Practice Problems
  • Vo 5.0 m/s Vf ? m/s t 6.0 s a 3.0 m/s2

121
Practice Problems
  • Vo ? Vf 42.0 mi/hr t 2.50 s a 4.00
    mi/hr/s

122
Practice Problems
  • Vo 15.0 mi/hr Vf 60.0 mi/hr t ? a
    4.0 mi/hr/s

123
Practice Problems
  • Vo 30.0 m/s Vf ? t 5.00 s a -9.81 m/s2

124
Bell Work do in notes!
  1. Nick throws a ball into the air with a velocity
    of 30 m/s upwards. Gravity causes the ball to
    accelerate 10 m/s2 downwards. How fast is the
    ball going 2.5 s after he threw it?
  2. What is the velocity 3 seconds after he threw it?
  3. What is the velocity 5 seconds after the threw
    it?
  4. What is the velocity 10 seconds after the threw
    it?

125
  • Today you are going totake notes on and complete
    a worksheet on acceleration.
  • So you candevelop an understanding of
    acceleration and solve acceleration problems.
  • Youll know youve got it when you can
  • Accurately complete the problems questions

126
Velocity (v) vs. Time (t) Graph
  • Slope ?
  • Any straight line ? ?
  • Line curving up or down ? ?
  • To find velocity ?
  • Area under curve ?

127
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128
Bell Work 4/2/13 6 min
  • Find the v and a of the object in the graph
  • a.
  • b.
  • c.
  • d.
  • e.
  • 2. W5SAYBoS

Velocity (m/s)
129
Bell Work 3/1/13 7 min
  • Use the factor label method to convert the
    following.
  • Brittany is walking when she decides to sprint
    down the hallway. Starting at 3.00 mi/hr, she
    reaches a speed of 12.0 mi/hr in 2.0 seconds.
    Calculate her acceleration.
  • 9.81 m/s2 ? ft/s2 (1 yd 0.914 m, 1 yard 3
    ft)

130
  • Today you are going totake notes on velocity
    graphs and complete a velocity graph worksheet.
  • So you canfind the velocity and acceleration of
    an object using a velocity graph.
  • Youll know youve got it when you can
  • Accurately complete the velocity graph worksheet.

131
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132
Velocity (v) vs. Time (t) Graph
  • To find velocity, just read the graph!
  • Slope acceleration
  • slope, acceleration,
  • 0 slope, 0 acceleration, (_________ speed)
  • - slope, - acceleration
  • Any straight line ? constant acceleration
  • Line curving up or down ? acceleration is
    changing
  • Area under curve displacement

133
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134
Bell Work 3/31/14
  • Take your velocity graph worksheets out
  • What is happening in each segment of this
    Velocity vs time graph?
  • W5SAYWoS

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Velocity Graph WKST 1
136
Car Acceleration Web Activity
  • Renault Clio 3.0 V6 255 - 2001 0 to 60 mph
    time - 5.8 s

137
Car Acceleration Web Activity
138
Velocity (m/s)
Time (s)
139
Velocity vs. Time Graph
  • Find the velocity of the object in the graph
  • a.
  • b.
  • c.

140
Bell Work 3/1/12 6 min
  • Find the v a of the object in the graph at
    points

141
B
C
D
A
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Bell Work 3/2/11 6 min
  • Find the v and a of the object in the graph
  • a.
  • b.
  • c.
  • d.
  • e.

Velocity (m/s)
145
Bell Work 2/24/12 6 minutes
  • Do this bell work on a separate sheet of paper.
    It will be collected graded when the timer
    sounds.
  • It takes Cam 6.5 minutes to run 1.0 mile. What
    is his velocity?
  • Two days ago Courtney was walking the halls after
    school, minding her own business. She heard a
    roaring behind her, and turned to see Disha
    driving a car down the hall. Courtney had been
    walking at a speed of 4.0 ft/s. She quickly
    accelerated at a rate of 8.0 ft/s2 for 1.5 s.
    What was Courtneys final velocity? (identify
    all variables, write the equation, circle your
    answer include units.

146
Bell Work 3/5/12 5 minutes
  • It takes Cam 6.5 minutes to run 1.0 mile. What
    is his velocity?
  • Sarah goes from a speed of 1.5 m/s to a speed of
    6.0 m/s in 3.0 s. What is her acceleration?

147
Graded Bellringer 11/7/14
  1. From rest, a cow can reach a velocity of 15 m/s
    in 3.0 s. What is the cows acceleration?
  2. Kylie throws a water balloon downwards out of the
    window. The balloon accelerates at 9.81 m/s2.
    After 5.00 seconds, the balloon is traveling at
    68.67 m/s. What was the initial velocity of the
    balloon?
  3. Emily is driving a car at 12.0 mi/hr. If she
    accelerates at 8.50 mi/hr/s, how many seconds
    will it take her to reach 65.5 mi/hr?

148
To study
  1. 2.1 Measuring Motion Reading Guide
  2. Displacement Graph Wkst 2
  3. Velocity problems 1a
  4. Acceleration wkst 1

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Bell Work 2/27/12 7 minutes
  • Starting from rest, Luke rolls down a hill. If he
    has a speed of 18.0 m/s after 4.0 seconds, what
    is his acceleration?
  • Jamie is driving a go-cart. She is going 5.00
    m/s when she decides to pass Marc. She
    accelerates at 5.200 m/s2 for 2.000 s,
    successfully leaving Mark in the dust. What was
    Jamies final velocity?
  • W5SAYW

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Schedule
  • Wednesday
  • Quiz on velocity
  • Thursday
  • Return quiz
  • Finish Paper Airplane Lab
  • Friday
  • Airplane Lab Questions?
  • Catapults
  • Monday
  • Acceleration
  • Tuesday
  • Acceleration
  • Take home quiz
  • Wednesday
  • Acceleration Graphs

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Bell Work 2/9/11 5 min
  • Solve for t.
  • 280
  • 2. It takes Stu, a slimy slug, 20 minutes to
    travel from his favorite bush to the local trash
    can (a trip of 30 meters). If he traveled at the
    same speed, how far would he travel in 60 minutes?

20 t
162
Bell Work 2/10/11 6 min
  • Solve for z.
  • 20
  • It takes Emily A. 2 minutes to travel from
    history to lunch (a trip of 200 meters). If she
    traveled at the same speed, how far would she
    travel in 30 minutes?
  • Draw an inverted stick figure.

10 z
163
Bell Work 2/11/11 6 min
  • Solve for G. Show all 3 steps.
  • 80
  • 2. It takes Alec 3000 seconds to travel from the
    cafeteria to Physical Science(a trip of 500
    meters). What was his average velocity?
  • If he traveled at the same speed, how far would
    he go in 10 seconds?

240 G
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Bell Work 2/14/11 6 min
  • Get your homework out. Dont copy!
  • Make sure you clearly date your bell work!
  • If an object is traveling at 1600 m/s, how long
    will it take it to travel 2000 meters?
  • W5SAYW
  • G Finish Test!

165
Schedule
  • Students will be taking yesterdays quiz if they
    havent already
  • Others will be working on their final study
    guides. If you have questions, ask!

166
Bell Work 2/16/11 6 min
  • Starting from rest (Vo 0), a cow accelerates to
    17 mi/hr in 8 seconds. What is her acceleration?
  • Find the velocity of the object in the graph
  • a. 6 - 7 s
  • b. 7 - 12 s
  • c. 12 - 12.5 s

167
Bell Work 2/17/11 6 min
  • A cow is running at 17 mi/hr when she suddenly
    hits a swamp. If it takes her 4 seconds to be
    halted by the muck, what was her acceleration?
  • Find the velocity of the object in the graph
  • a. 6 - 7 s
  • b. 7 - 12 s
  • c. 12 - 12.5 s

168
Bell Work 4/3/13 6 min
169
  • Tuesday 4/2
  • Review velocity worksheet a couple graphs
  • Complete study guide
  • Wednesday
  • Review study guide
  • Thursday
  • Test on 10.1 10.2 Velocity Acceleration
    (includes 2 graphs)
  • Study
  • 10.1 questions
  • Acceleration Worksheet 1
  • study guide (all other ch. 10 worksheets may be
    helpful)
  • Friday
  • Begin 10.3 Forces Motion

170
  • Today you are going toreview the study guide
    other information on tomorrows test.
  • So you canknow exactly what to study for
    tomorrows test.
  • Youll know youve got it when you can
  • Accurately answer all questions on the
    worksheets.

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Displacement (m)
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Bell Work 2/21/11 6 min
  • Find the velocity
  • of the object in
  • the graph
  • a. 0 - 5 s
  • b. 5 - 9 s
  • 2. Find the
  • acceleration of the
  • object in the graph
  • From 0 5 s
  • 3. W5SAYW

Velocity (m/s)
Time (s)
175
Bell Work 5/23/12 4 min
  • Will be collected!
  • Find the v a
  • of the object in
  • the graph at
  • points A, B, C.

176
  • Objectives
  • Review x vs. t v vs. t graphs
  • Review kinematic problems
  • Begin reviewing forces, friction, air
    resistance
  • Schedule
  • BW Check HW
  • Review schedule
  • Review HW
  • Start Study Guide II
  • Return Tests

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  • Vinny is driving a go cart with a constant speed
    of 35.0 m/s. How far will he travel in 40
    seconds?

180
  • It takes Megan 22.0 seconds to run 50.0 meters.
    What was her average velocity?

181
  • B-Shell fires an arrow at 300 feet per second.
    How many feet did it travel after 0.25 seconds?

182
  • Starting from rest, Peterson reaches a speed of
    25 m/s in 4 seconds. What was her acceleration?

183
  • Carl throws a rock with a velocity of 20 m/s.
    How many seconds will it take to travel 40
    meters?

184
  • Alex runs down a hill. If he has an acceleration
    of 6 m/s2 and his initial velocity was 2 m/s,
    what is his velocity after 2 seconds?

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Bell Work 2/23/11 6 min
  • Find the velocity
  • of the object in
  • the graph at
  • a. 10 s
  • b. 20 s
  • 2. Find the
  • acceleration of the
  • object in the graph
  • a. from 10 20 s
  • b. from 30 40 s
  • c. from 50-60 s

187
Bell Work 3/2/11 5 minutes
  1. Natalie and Qinzhi are doing the marble lab.
    Natalie releases the marble. Qinzhi starts the
    timer when the marble hits the starting mark and
    stops the timer when the marble hits the 40 cm
    mark. The timer reads 0.85 s. If the starting
    mark was 15 cm in before the zero mark, what was
    the average velocity of the marble?

188
Bell Work 3/4/11 5 minutes
  1. Kevin and B-Shell are doing the marble lab. Kevin
    releases the marble. B-Shell starts the timer
    when the marble hits the starting mark and stops
    the timer when the marble hits the 60 cm mark.
    The timer reads 0.92 s. If the starting mark was
    5 cm in before the zero mark, what was the
    average velocity of the marble?

189
Marble Lab
  • Make careful measurements!
  • Stay focused on completing the lab. Only
    interact with your lab partner.

190
Marble Lab 50 Points!!
  • Due by the end of class tomorrow.
  • Tape ramp to wall.
  • Dont make it too steep!
  • Make the part that you measured straight.
  • Tape the end up so the marble doesnt fall off.
  • Time trials.

191
Marble Lab
  • Create 2 graphs
  • Distance vs. Time (use average time)
  • Velocity vs. Time (use average time)
  • Plot both trials on each graphuse 2 different
    colored to differentiate
  • You must have a key!

192
Creating Graphs
  • Title at Top (y axis vs. x axis)
  • Lines and scales neatly drawn/written
  • Key (if applicable)
  • Axes labeled, including units
  • Axes scaled frequently marked
  • Scale is consistent and easy to interpret using
    lines on graph paper
  • graph is made large enough to read origin begins
    at 0,0 if appropriate

193
Bell Work 1/25/11 5 min
  1. Calculate the speed of an object that covers 40
    feet in 3 seconds.
  2. Calculate the distance an object covers if it has
    a speed of 55 km/hr and it travels for 7 hours.
  3. Calculate the time it takes for an object with a
    speed of 20 m/s g to travel 130 m.

194
Bell Work 1/27/11 5 min
  1. What is the difference between speed and
    velocity?
  2. Give a situation where an objects speed change
    while velocity remains the same.
  3. Dillon is sledding down the hill one fine day.
    If it takes him 15 seconds to sled 63 meters,
    what was his average speed?
  4. One mile per hour is equal to 2.2 m/s. How fast
    was Dillon traveling in miles per hour? (Use
    dimensional analysis.)

195
Bell Work 1/28/11 5 min
  • A. The slope of a line is __ over __. What is
    the equation for the slope of a displacement (x)
    vs. time (t) graph? (same as equation for __)
  • Draw a separate displacement vs. time graph for
    each of the following objects
  • An object with constant, positive velocity
  • A slower object with constant, positive velocity
  • An object with zero velocity
  • An object with negative velocity
  • A faster object with negative velocity

196
Bell Work 2/18/11 2 minutes
  1. What is the equation for slope?
  2. What is the average velocity of the object in the
    graph below?

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