A vertical mass-spring system executes simple harmonic oscillations with a period of $2\,s$. A quantity of this system which exhibits simple harmonic variation with a period of $1\, s$ is
A
Velocity
B
Potential energy
C
Phase difference between acceleration and displacement
D
Difference between kinetic energy and potential energy
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A
Velocity
a (a) The time period of potential energy and kinetic energy is half that of SHM.
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