A system exhibiting S.H.M. must possess A. Elasticity as well as inertia B. Elasticity, inertia and an external force C. Elasticity only D. Inertia only

Elasticity as well as inertia
Elasticity, inertia and an external force
Elasticity only
Inertia only

The correct answer is A. Elasticity as well as inertia.

A system exhibiting S.H.M. must possess both elasticity and inertia. Elasticity is the

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ability of an object to return to its original shape after being deformed. Inertia is the resistance of an object to any change in its motion.

In S.H.M., the restoring force is provided by the elasticity of the system. The inertia of the system opposes the change in motion caused by the restoring force. The combination of these two forces results in the periodic motion of the system.

Option B is incorrect because it includes an external force. An external force is not required for S.H.M. to occur.

Option C is incorrect because it does not include inertia. Inertia is required for S.H.M. to occur.

Option D is incorrect because it does not include elasticity. Elasticity is required for S.H.M. to occur.

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