From position – time graph shown in the figure, find :
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1
Answer:
A made a displacement of 60m(80-20) in 8 seconds
velocity= displacement/time
60/8=7.5
B made a displacement of 20m(60-40) in 8 seconds
velocity =20/8
2.5
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Answer:
Contrasting a Constant and a Changing Velocity::
To begin, consider a car moving with a constant, rightward (+) velocity - say of +10 m/s.
If the position-time data for such a car were graphed, then the resulting graph would look like the graph at the right. Note that a motion described as a constant, positive velocity results in a line of constant and positive slope when plotted as a position-time graph.
Now consider a car moving with a rightward (+), changing velocity - that is, a car that is moving rightward but speeding up or accelerating.
Explanation:
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