Question

b) Time period of a bar pendulum is 1.55 s.
Find its equivalent length.​

Answer 1

The time period of oscillation for a simple pendulum is T=2π

(

L/g), while that for a compound pendulum is T=2π

(

I/mgX)

Equating both we get, L=I/mX=(mK

2

+mX

2

)/X=K

2

/X+X; K is the radius of gyration

The correct option is (b)