Physics-
General
Easy
Question
A ball is dropped vertically downwards from a height 
above the ground. It hits the ground and bounces up vertically to a height 
. Neglecting subsequent motion and air resistance, its speed varies with the height 
above the ground as
The correct answer is:
For downward motion.
For upward motion,
The graph will be parabolic in both case. But velocities will be opposite. But speed never be negative.
Hence, [b] is correct.
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