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A particle is given a horizontal velocit...

A particle is given a horizontal velocity u, from the point P on a smooth horizontal floor which has a vertical circular track at the end. ABC is a semicircular track of radius r in the vertical plane. If the path length PA is `x = 3r` and the particle returns to point P, then the initial speed of the particle is

A

`u=5sqrt(gr)`

B

`u=(5)/(2)sqrt(gr)`

C

`u=4sqrt(gr)`

D

`u=(3)/(2)sqrt(gr)`

Text Solution

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The correct Answer is:
B
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