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A box of dimentsion H xx B xx R is kept ...

A box of dimentsion `H xx B xx R` is kept on a frictionless inclined plane as shown in the figure. A stone is thrown from one corner P with speed u parallel to the ceiling of the box such that it hits the floor of the box. At the same instant, the box is released to slide down the plane. Calculate the time of flight.

A

`sqrt((2H)/( g cos theta ))`

B

`sqrt((2H)/( g))`

C

`sqrt((H)/( g cos theta ))`

D

Cannot be calculated

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The correct Answer is:
A
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