Work Power and Energy 4 Question 5
7. 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
(1987, 2M)
(a) its velocity is constant
(b) its acceleration is constant
(c) its kinetic energy is constant
(d) it moves in a circular path
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Answer:
Correct Answer: 7. (c, d)
Solution:
- The given case is of uniform circular motion, in which speed of kinetic energy remains constant. Direction of velocity and acceleration keep on changing although its magnitude remains constant.
