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(2g)/(2pi)`D. `2pi sqrt(2g)`

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(2g)/(2pi)`D. `2pi sqrt(2g)`
Answer» Correct Answer - C Maximum acceleration = `g` `:. omega ^(2) A = g` `:. (2pi f)^(2) (0.5) = g` `f^(2) = (2g)/(2pi)^(2)` `:. f = sqrt (2g)/(2pi)`.

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