The displacement of a particle of mass 3g executing simple harmonic motion is given by x=3sin(0.2t) in SI units. The kinetic energy of
the particle at a point which is at a displacement equal to 1/3 of its amplitude from its mean position is

• A

  $12\times {10}^{-3} \mathrm{J}$

• B

  $25\times {10}^{-3} \mathrm{J}$

• C

  $0.48\times {10}^{-3} \mathrm{J}$

• D

  $0.24\times {10}^{-3} \mathrm{J}$