Question

The time period of a spring-mass system is T in air when the mass is partially immersed in water the time period of oscillation is

(A) T (B) < T (C) >T (D) ≤ T

Answer 1

Correct option  (B) < T

Explanation:

The time period of the spring mass system in air = T = 2p√(m/k) When the mass is  immersed in water partially, the buoyent force = ρAxg & the spring force = k.x. when the body is displaced through a small distance x.