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A very broad elevator is going up vertic...

A very broad elevator is going up vertically with a constant acceleration of `2m//s^(2)`. At the instant when its velocity is `4m//s` a ball is projected form the floor of the lift with a speed of `4m//s` relative to the floor at an elevation of `30^(@)`. Time taken by the ball to return the floor is `(g=10ms^(2))`

A

1/2 s

B

1/3 s

C

1/4 s

D

1 s

Text Solution

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The correct Answer is:
B
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