Explain motion under gravity and also a draw a time graph for a freely falling body.
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A velocity versus time graph for a free-falling object is shown below. Observe that the line on the graph is a straight, diagonal line. This analysis of the slope on the graph is consistent with the motion of a free-falling object - an object moving with a constant acceleration of 9.8 m/s/s in the downward direction.
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(i)During the free-fall motion of a body, the gravity is the only force acting upon the object.
(ii)The motion of a free falling body is non-uniform because It experiences an acceleration of 9.81ms
−2
under the influence of gravity.
Hence its motion is uniformly accelerated.
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