JEE Main Physics question

PhysicsOscillationsJEE Main

There is a simple pendulum hanging from the ceiling of a lift. When the lift is standing still, the time period of the pendulum is T. If the resultant acceleration becomes g/4, the new time period of the pendulum is

Answer: (C)

Solution

T ∝ 1/√, so T'/T = √(g/ = √(g/(g/4)) = √4 = 2 ⟹ T' = 2T.

Question ID VK-153240