A flat horizontal board moves up and down under SHM vertically with amplitude A. The shortest permissible time period of the vibration such that an object placed on the board may not lose contact with the board is

A flat horizontal board moves up and down under SHM vertically with am

1.	A flat horizontal board moves up and down under SHM vertically with amplitude A. The shortest permissible time period of the vibration such that an object placed on the board may not lose contact with the board is
Answer» `2PI sqrt((g)/(A))` `2pi sqrt((A)/(g))` `2pi sqrt((2A)/(g))` `(PI)/(2) sqrt((A)/(g))` ANSWER :B

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A flat horizontal board moves up and down under SHM vertically with amplitude A. The shortest permissible time period of the vibration such that an object placed on the board may not lose contact with the board is

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