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An Intiative by Sri Chaitanya
a
Inertia only
b
Elasticity as well as inertia
c
Elasticity, inertia and an external force
d
Elasticity only
answer is B.
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Detailed Solution
Conditions for SHM (i) There must be an elastic restoring force acting on the system, (ii) the system must have inertia, and (iii) the acceleration of the system should be directly proportional to its displacement and is always directed to mean position