Duduli

Answer:- Amplitude of a particle vibrating in SHM is defined as it's maximum displacement on either side of the mean position.

Answer:- If a body vibrates without the help of any external periodic force on it, it is said to be excuting free vibrations.

Answer:- Restoring force is a force that try to move the body back to its mean position or equilibrium position.

Answer:- It consists of a heavy metallic bob,  suspended from a rigid support by means of a long weightless, flexible and inextensible string.

Answer:- A spring pendulum consists of a heavy mass suspended from a rigid support by means of a massless spring.

Answer:- Resonance is the phenomenon of setting a body into vibrations by a strong periodic force whose frequency  coincides with the natural frequency of the body.

Answer:- A simple pendulum having a time period of two second is called a second pendulum.