Question

A ball is dropped from a height of 20m and rebounds with a velocity which is

Answer 1

Answer:

sorry your question is incomplete if you complete your question.

I can solve it by a simple tricks.

Height 20 metre is given you can use the Newton's first law for solving this question.

And you get the velocity but remember the velocity is in negative because it is rebounds.

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Answer 2

Answer:

Rebound Velocity= 20m/s

Explanation:

Given data:

Height, h=20m

Initial velocity= 0

Acceleration,g= 10m/s^2

Let the velocity at the rebound, the final velocity be v.

V^2= U^2 - 2×a×s

v^2= 0- 2×(-10)×20

v= 20 m/s

Hope, it helps!