motion graphs

1
Chapter 4

• motion graphs

2
What are the three ways a car can accelerate?

• speeding up
• slowing down
• turn the steering wheel

3
SI Units for motion

• distance
• meters (m)
• time
• seconds (s)
• speed
• (m/s)
• velocity
• m/s and direction
• acceleration
• m/s2

4
Position (distance) vs. Time Graphs
At rest, no change in position
5
Position (distance) vs. Time Graphs
The objects shown by the yellow and blue lines
are covering equal amounts of distance in equal
amounts of time.
The velocity of the object can be calculated by
evaluating the slope of each line, or one point
along each line.
Yellow line (constant speed of 3 m/s) Blue line
(constant speed of 1 m/s)
6
Position (distance) vs. Time Graphs
The object represented by the yellow line is
covering a greater amount of distance with each
unit of time that passes. (it is speeding up)
Changing distance over time or acceleration.
7
Position (distance) vs. Time Graphs
Constant speed
8
Distance vs. Time Graphs
Yellow line represents faster constant speed
9
Distance vs. Time Graphs
Slower then faster constant speed
10
Distance vs. Time Graphs
Constant speed, at rest, constant speed
11
Velocity vs. Time Graphs
Constant speed
12
Velocity vs. Time Graphs
Acceleration
13
Velocity vs. Time Graphs
Deceleration or negative acceleration
14
Velocity vs. Time Graphs
Yellow line represents faster acceleration
15
Velocity vs. Time Graphs
Constant speed of 30 m/s
16
Velocity vs. Time Graphs
Red line represents faster rate of deceleration
(3 m/s2) .
17
Velocity vs. Time Graphs
Red line represents faster acceleration, blue
line represents deceleration.