Understanding Position
– Time Graphs
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Horizontal Line = Stopped! Look at the red line, which shows the position of an object over time. Is the object moving? No. Positive and Negative Motion Up is +. Pink is +. Down is negative. Green is negative. |
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Steeper lines are faster. The Green line is faster than the pink line. In fact, the speed of the green line is -60/6 or -10 cm/s while the speed of the pink line is roughly 30/10 or 3 cm/s. It doesn’t matter that green is negative. Click
here to learn how to calculate average speed. |
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Horizontal Line = Stopped! |
Curving lines = Acceleration! |
Curving lines = Acceleration! |
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Object
is slowing down Net
force is causing an acceleration |
Object
is speeding up Net
force is causing an acceleration |
Constant
Speed No
Net Force. Acceleration
= Zero |
Moving in negative
direction and then slowing down. Net force is causing an acceleration
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