A man of mass `60kg` is standing on a platform executing SHM in the vertical plane. The displacement from the mean position varies as `y = 0.5sin(2pift)`. The value of `f`, for which the man will feel weightlessness at the highest point, is (`y` in metre)A. `(g)/(4pi)`B. `4pig`C. `(sqrt(2)g)/(2pi)`D. `2pisqrt(2)g`

A man of mass `60kg` is standing on a platform executing SHM in the ve

1.	A man of mass `60kg` is standing on a platform executing SHM in the vertical plane. The displacement from the mean position varies as `y = 0.5sin(2pift)`. The value of `f`, for which the man will feel weightlessness at the highest point, is (`y` in metre)A. `(g)/(4pi)`B. `4pig`C. `(sqrt(2)g)/(2pi)`D. `2pisqrt(2)g`
Answer» Correct Answer - C For welgthlessness `mg = momega^(2)a rArr g = (2pif)^(2) (0.5)` `rArr 2 pif = sqrt(2)g rArr f = (sqrt(2)g)/(2pi)`

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