A horizontal platform with an object placed on it is executing SHM in the vertical direction. The amplitude of oscillation is 3.92xx 10^(-3)m. What must be the least period of these oscillations, so that the object is not detached from the platform?

A horizontal platform with an object placed on it is executing SHM in

1.	A horizontal platform with an object placed on it is executing SHM in the vertical direction. The amplitude of oscillation is 3.92xx 10^(-3)m. What must be the least period of these oscillations, so that the object is not detached from the platform?
Answer» `0.1256 s` `0.1356 s` `0.1456 s` `0.1556 s` SOLUTION :According to FIGURE `MG-R = ma` (a= acceleration) For `R= 0, mg= ma implies mg= m A omega^(2)` `implies omega = sqrt(g"/"A) = sqrt((9.8)/(3.92xx 10^(-3)))= 50` `implies T= (2pi)/(omega)= (2pi)/(50)= 0.1256s`.