Forced Vibrations are the vibrations under the influence of an external periodic force.

Their amplitude depends on the frequency of the external force. If it is equal to the natural frequency of the vibrating body then the amplitude is very large but when it is not equal then the amplitude is very small.

I am unable to understand this established relation between frequency and amplitude and why does this thing(which I stated above) happens.

P.S. : I am a tenth grader so please avoid the use of complicated terminologies.

Forced Vibrations are the vibrations under the influence of an external periodic force.

Their amplitude depends on the frequency of the external force. If it is equal to the natural frequency of the vibrating body then the amplitude is very large but when it is not equal then the amplitude is very small.

I am unable to understand this established relation between frequency and amplitude and why does this thing(which I stated above) happens.

P.S. : I am a tenth grader so please avoid the use of complicated terminologies.

Forced Vibrations are the vibrations under the influence of an external periodic force.

Their amplitude depends on the frequency of the external force. If it is equal to the natural frequency of the vibrating body then the amplitude is very large but when it is not equal then the amplitude is very small.

I am unable to understand this established relation between frequency and amplitude and why does this thing(which I stated above) happens.

Forced Vibrations are the vibrations under the influence of an external periodic force.

Their amplitude depends on the frequency of the external force. If it is equal to the natural frequency of the vibrating body then the amplitude is very large but when it is not equal then the amplitude is very small.

I am unable to understand this established relation between frequency and amplitude and why does this thing(which I stated above) happens.

P.S. : I am a tenth grader so please avoid the use of complicated terminologies.