A platform makes SHM in vertical plane, with amplitude of oscillation being 0.2 m. If a coin is placed on the top, what is the least period of the oscillation so that the coin may not loose the contact?

A platform makes SHM in vertical plane, with amplitude of oscillation

1.	A platform makes SHM in vertical plane, with amplitude of oscillation being 0.2 m. If a coin is placed on the top, what is the least period of the oscillation so that the coin may not loose the contact?
Answer» SOLUTION :For COIN not to loose contact `m(g-a_("max"))=0""g=a_("max")` `g=A((2PI)/T)^(2)""T=(2pi)/7`