The potential energy of a particle of mass $0.1\,kg,$ moving along $x-$ axis, is given by $U = 5x(x-4)\,J$ where $x$ is in metres. It can be concluded that
  • Athe period of oscillation of the particle is $\pi /5 \,s.$
  • Bthe speed of the particle is maximum at $x = 2 \,m$
  • C
    the particle executes simple harmonic motion
  • D
    all of the above
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