Question
For S.H.M. why is a restoring force necessary ?
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Answer
Restoring force is the force which restores or tries to restore the body or brings it back to its collected state. When a body S.H.M. it crosses the mean position due to its kinetic energy, the restoring force acts towards the equilibrium position, the same process is repeated. Therefore in oscillatory motion S.H.M. restoring force is essential in inclusion.
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