Question

A body strikes the floor vertically with a
velocity u and rebounds at the same speed.
The change in velocity would be
(b) 3u
(c) 2u
(d) zero
(a) u​

Answer 1

Answer: 2u

Explanation:since it rebounds

Final velocity is -initial velocity

Change in v = u-(-u) =2u

Answer 2

Answer:

(d) zero

Explanation:

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