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Q. |
If a body moves with a constant speed in a circle – |
A. | no work is done on it |
B. | no force acts on it |
C. | no acceleration is produced in it |
D. | its velocity remains constant |
Answer» D. its velocity remains constant | |
Explanation: A body moving with a constant speed in a circle is an example of uniform circular motion. The velocity vector is constant in magnitude but changing in direction. Since velocity is a vector quantity that has both magnitude and direction, a change in either the magnitude or the direction constitutes a change in the velocity which leads to change in acceleration. |
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