motion graphs distance vs. time graphs. motion graphs show the motion of an object in a graph....
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Motion Graphs
Distance vs. Time
Graphs
Motion Graphs
• Show the motion of an object in a graph.
• Graphs can help make motion easier to picture and understand
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)
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.
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.
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.
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.
What is the motion of the object in the graph below?
• No motion • Moving away fast at a constant speed• Stopped (no motion)• Moving away more slowly at a constant speed• Stopped (no motion)
What is the motion of the object in the graph below?
• Moving away at a constant speed• Stopped moving (no motion)• Accelerating
Distance Time Graphs Review
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.
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)
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