Kinematics Question 482

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 particle takes place in a plane. It follows that [IIT 1987]

Options:

A) velocity is constant

B) acceleration is constant

C) Kinetic energy it’s constant

D) It moves in a circular path

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Answer:

Correct Answer: C

Solution:

In the given condition, the particle undergoes uniform circular motion and for uniform circular motion the velocity and acceleration vector changes continuously but kinetic energy it’s constant for every point.



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