Motion Graphs

1
Motion Graphs

• Distance vs. Time
• Graphs

2
Motion Graphs

• Show the motion of an object in a graph.
• Graphs can help make motion easier to
  picture and understand

3
Distance-Time Graphs

• Time is always on the X-axis (bottom of the
  graph)
• Distance is always on the Y-axis (side of the
  graph)

4
Objects Not Moving/At Rest

• When an object is NOT moving, a horizontal line
  is shown on a distance-time graph
• Time is increasing to the right but the distance
  does not change.

5
Objects moving at a Constant Speed

• Time is increasing to the right and distance is
  increasing constantly with time.
• Constant speed is shown by straight lines on a
  graph.

6
Two objects moving at a constant speed

• The steeper line shows an object moving at a
  greater speed.
• It is covering a greater distance in a shorter
  period of time.
• Both lines are straight so both speeds are
  constant.

7
An Object Accelerating

• A curved line shows an object that is
  accelerating
• In this case the object shows in increase in
  speed since the line is getting steeper.

8
What is the motion of the object in the graph
below?
9

• No motion
• Moving away fast at a constant speed
• Stopped (no motion)
• Moving away more slowly at a constant speed
• Stopped (no motion)

10
What is the motion of the object in the graph
below?
11

• Moving away at a constant speed
• Stopped moving (no motion)
• Accelerating

12
Distance Time Graphs Review
13
Practice Reading a Graph

• What is the motion of the object in the graph?
• Constant Speed
• The line is straight so the object is moving at a
  constant speed.

14
What is the Speed of the object? Speed
distance time

• 5 meters in 1 sec.
• 25 meters in 5 sec.
• 50 meters in 10 sec.
• 5 1 5 m/s
• 25 5 5 m/s
• 50 10 5 m/s
• This object is travelling at a constant speed of
  5 m/s (meters per second)

15
Interpret the graph below

• Which car is traveling the fastest?
• Car D
• Which car is traveling the slowest?
• Car A
• Which car is traveling at a speed of 30 Km/h?
• Car C