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An elavator is going up vertically with ...

An elavator is going up vertically with a constant accelerartion of `2m//s^(2)`. At the instant when its velocity is `4m//s` a ball is projected from the floor of the elavator with a speed of `4m//s` relative to the floor with an angular eleavation of `60^(@)`. The time taken by the ball to return the floor is `(g=10m//s^(2))`

A

`1/3s`

B

`1/(sqrt(3))s`

C

`2/(sqrt(3))s`

D

`sqrt(3)s`

Text Solution

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The correct Answer is:
B
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