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A particle is acted upon by a force of c...

A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle. The motion of the particle takes place in a plane. It follows that

A

the Kinetic energy of the particle changes with time.

B

the acceleration of the particle is constant.

C

the velocity of the particle is constant

D

the speed of the particle is constant

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The correct Answer is:
D
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