Question

A simple pendulum of length 196 cm performs linear SHM of amplitude 8 cm. Find the restoring force on its bob of mass 50 g at an extreme position.

Answer 1

F = mg sin θ = mg θ (for θ small and expressed in radian)

= `(5 xx 10^-2)(9.8)(8/196)`

= `(40 xx 10^-2)/20`

= 0.02 N