Motion in a Plane - Result Question 58
61. When a body moves with a constant speed along a circle
[1994]
(a) its velocity remains constant
(b) no force acts on it
(c) no work is done on it
(d) no acceleration is produced in it
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Solution:
- (c) On circular motion, the force acts along the radius and displacement at a location is perpendicular to the radius i.e., $\theta=90^{\circ}$
As work done $=\vec{F} \cdot \vec{S}=F S \cos 90^{\circ}=0$
