Question

# 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 particles takes place in a plane. It follows that

A
its kinetic energy is constant
B
its acceleration is constant
C
its velocity is constant
D
it moves in a straight line

Solution

## The correct option is A its kinetic energy is constantWork done by such force is always zero since force is acting in a direction perpendicular to velocitytherefore from work energy theorem$$= \Delta K = 0$$K remains constantPhysics

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