# Motion and Force Unit Review - PowerPoint PPT Presentation

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## Motion and Force Unit Review

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### Motion and Force Unit Review An object being pushed to the right Ffriction Fnorm Fapp Fgravity An object being pushed to the left Fgravity Fnorm Fapp Ffriction Jimmy ... – PowerPoint PPT presentation

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Title: Motion and Force Unit Review

1
Motion and Force Unit Review
2
Define the following terms
3
Acceleration
• How quickly the velocity changes.

4
Balanced Force
• The net force equals zero.
• It is like having no force on the object at all

5
Centripetal Force
• Any force that keeps an object moving in a circle.

6
Distance
• The amount of space between 2 points

7
Force
• A push or pull on an object.
• Something that changes the motion of an object.

8
Friction
• A force that resists the motion between two
surfaces in contact.

9
Gravity
• The force that objects exert on each other
because of their masses.

10
Inertia
• The resistance of an object to a change in the
speed or direction of its motion.

11
Mass
• The amount of matter in an object.

12
Motion
• A change in position over time.

13
Net Force
• The overall force acting on an object when all of
the forces acting on it are combined.

14
Speed
• How fast something moves over a distance in a
defined amount of time.

15
Time
• An interval between 2 events.

16
Unbalance Force
• One force acting on an object is greater than the
other causing a change in motion of the object.

17
Velocity
• Speed in a specific direction.

18
Weight
• The force of gravity on an object.

19
Newtons 1st Law of Motion
• Objects at rest remain at rest.
• Objects in motion remain in motion with the same
velocity unless acted upon by an unbalanced force.

20
Newtons 2nd Law of Motion
• The acceleration of an object increases with
increased force and decreases with increased
mass.
• The direction in which an object accelerates is
the same as the direction of the force.

21
Newtons 3rd Law of Motion
• Every time one object exerts a force on another
object, the second object exerts a force that is
equal in size and opposite in direction back on
the first object.

22
Write what measurement each letter represents and
then the formula for the following
23
Speed
• S D/T
• S speed
• D distance
• T time

24
Distance
• D ST
• D distance
• S speed
• T time

25
Time
• T D/S
• T time
• D distance
• S speed

26
Force
• F MA
• F force
• M mass
• A acceleration

27
Mass
• M F/A
• M mass
• F force
• A acceleration

28
Acceleration
• A F/M
• A acceleration
• F force
• M mass

29
Draw a box diagram showing direction of all
forces for the following
30
A Balanced Force
Fnorm
Fapp
Ffriction
Fgravity
31
An object slowing down
Fnorm
Ffriction
Fapp
Fgravity
32
A falling object
Fgravity
33
An object rising
Fapp
Fgravity
34
An object being pushed to the right
Fnorm
Ffriction
Fapp
Fgravity
35
An object being pushed to the left
Fnorm
Fapp
Ffriction
Fgravity
36
Jimmy skated 50 m in 10 s. What was his average
speed?
• Formula S D/T
• Given distance 50 m and time 10 s
• Work S 50 m / 10 s

37
What force should Lori apply to a 5 kg box to
give it an acceleration of 2 m/s2?
• Formula F MA
•
• Given Mass 5 kg and Acc. 2 m/s2
•
• Work F (5kg)(2 m/s2)
•
• Answer F 10 kg/ m/s2 or 10 N

38
Which graph shows a car slowing down?
• D

39
Which graph shows a car stopped?
• C

40
Which graph shows a car traveling at constant
speed?
• A

41
32-42 Answer questions 1-5 on page 37 and 1-6 on
page 73
• 32. A
• 33. C
• 34. B
• 35. D
• 36. B
• 37. B
• 38. D
• 39. B
• 40. C
• 41. B
• 42. B