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The potential energy of a particle of mass 0.1 jg moving along the `x`-axis is given by `U = 5x ( x - 4)J, where `x` is in metre . It can be concluded that


Options:
A .  the particle is acted upon by a constant force
B .  the speed of the particle is maximum at `x = 2 m`
C .  the particle cannot execute simple harmonic motion
D .  the period of oscillation of the particle is `pi/20 s`
Answer: Option B



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