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A small ball falling vertically downward...

A small ball falling vertically downward with constant velocity `4m//s` strikes elastically a massive inclined cart moving with velocity `4m//s` horizontally as shown. The velocity of the rebound of the ball is

A

`4sqrt2 m//s`

B

`4 sqrt3 m//s`

C

`4 m//s`

D

`4 sqrt5 m//s`

Text Solution

Verified by Experts

The correct Answer is:
D
Cart frame

Ground frame

The velocity of rebound `= 4sqrt5 m//s`
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