15. 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
Option A Solution: Basic conditions to execute simple harmonic motion are: (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.
