Bell Ringer1-11-11 - PowerPoint PPT Presentation

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Bell Ringer1-11-11

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... run Speed Average Speed Instantaneous Speed Velocity Slope Vocabulary HowStuffWorks Videos – PowerPoint PPT presentation

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Title: Bell Ringer1-11-11


1
Bell Ringer 1-11-11
  1. What is the formula for speed?
  2. What is an example unit for speed?
  3. Give an example of something that has speed.
  4. What type of graph shows speed?
  5. What does a straight sloped line tell you in a
    distance-time graph?

2
Chapter 9 Section 2 Speed
3
Objectives
  • ALCOS Objective 1
  • Identify steps within the scientific process
  • Applying process skills to interpret data from
    graphs.
  • ALCOS Objective 8
  • Identify Newtons three laws of motion.

4
Speed
  • The distance traveled by the time it takes to
    travel the distance is called speed.
  • The formula for speed is
  • Speed distance or s d
  • time t
  • In SI units, speed is measured in meters per
    second (m/s).

5
  • An object in motion can change its speed many
    times as it moves from one point to another,
    speeding up or slowing down.

6
  • Average speed is the total distance traveled
    divided by the total time taken.
  • Example
  • Total distance 32 km 13 km
  • Total time 2 h 1 h
  • Average Speed 45 km
  • 3 h

7
  • An objects speed at a particular moment, or
    instant, in time is called instantaneous speed.

8
  • Constant speed occurs when an object travels at a
    steady rate with the same speed for a period of
    time.

9
Velocity
  • Velocity is the speed of an object in a given
    direction. (Ex. 30 km/h north)
  • Velocity changes if either or both of these
    change (speed or direction).

10
Slope
  • Slope is the steepness of a line on a graph.
  • It tells you how fast one variable changes in
    relation to the other variable in the graph.
  • In other words, the slope tells you the rate of
    change.

11
Formula
  • slope rise
  • run

12
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13
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14
Vocabulary
  • Speed
  • Average Speed
  • Instantaneous Speed
  • Velocity
  • Slope

15
  • HowStuffWorks Videos "Extreme Engineering Maglev
    Train
  • HowStuffWorks Videos "Hyperspeed Risk of Extreme
    Maglev Speeds"
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