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A block of mass m rests on a platform. T...

A block of mass m rests on a platform. The platform is given up and down S.H.M. with an amplitude d. What can be the maximum frequency so that the block never leaves the platform ?

A

`sqrt(g//d)`

B

`(1)/(2pi)sqrt((g)/(d))`

C

`(1)/(2pi)((g)/(d))`

D

`(1)/(2pi)sqrt((g)/(d))`.

Text Solution

Verified by Experts

The correct Answer is:
B
For block to remain in contact `a_("max")=g`.
`:." "omega^(2)d=gimplies4pi^(2)vd=g`
`v=(1)/(2pi)sqrt(g//d)`
Hence correct choice is (b).
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