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A block A starts sliding on a smooth tra...

A block A starts sliding on a smooth track from a height h as shown in the figure. The track smoothly joins into a conveyor belt which is being driven by a pulley of radius r. I the angular velocity `omega` of the pulley is such that the block A doesn't slip on the belt, the value of `omega` is

A

`(sqrt(gh))/(r)`

B

`(sqrt(hg))/(2r)`

C

`(sqrt(2gh))/(r)`

D

`(2sqrt(gh))/(r)`

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