Q.

A cylindrical block of mass M and area of cross section A is floating in a liquid of density ρ and with its axis vertical. When depressed a little and released the block starts oscillating. The period of oscillation is _________.             [2026]

1 πρAMg  
2 2πρAMg  
3 π2MρAg  
4 2πMρAg  

Ans.

(4)