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Questions  

The particle executing simple harmonic motion has a kinetic energy K0 cos2 ωt. The maximum values of the potential energy and the total energy are respectively

a
0 and 2K0
b
K02 and K0
c
K0 and 2K0
d
K0 and K0

detailed solution

Correct option is D

In simple harmonic motion, the total energy of the particle is constant at all instants which is totally kinetic when particle is passing through the mean position and is totally potential when particle is passing through the extreme position.The variation of PE and KE with time is shown in the figure, by dotted parabolic curve and solid parabolic curve respectively. Figure indicates that maximum values of total energy, KE and PE of SHM are equal.Now,  EK = K0cos2 ωt∴  (Ek)Max = K0So, (Ep)Max = K0 and (E)Total = K0

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