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An elevator car (lift) is moving upward ...

An elevator car (lift) is moving upward with uniform acceleration of `2 m//s^(2)`. At the instant, when its velocity is 2 m/s upwards a ball thrown upward from its floor. The ball strikes back the floor 2s after its projection. Find the velocity of projection of the ball relative to the lift.

A

`10 m//s uarr`

B

`10 m//s darr`

C

`12 m//s uarr`

D

`12 m//s darr`

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The correct Answer is:
C
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