Question

wht the amplitude of the vibrating pendulum should be small​

Answer 1

Explanation:

When amplitude of the vibrating pendulum is small then angular displacement of the bob used in simple pendulum is small. ... Since F is directed towards mean position, therefore the motion of the bob of simple pendulum will be SHM if θ is small.

Answer 2

Answer:

When amplitude of the vibrating pendulum is small then angular displacement of the bob used in simple pendulum is small. ... Since F is directed towards mean position, therefore the motion of the bob of simple pendulum will be SHM if θ is small.