Question : If a body moves with a constant speed in a circle:
Option 1: no work is done on it
Option 2: no force acts on it
Option 3: no acceleration is produced
Option 4: its velocity remains constant
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Correct Answer: no work is done on it
Solution : The correct option is : that no work is done on it .
No work is done on a body while it rotates in a circle at a constant speed. This is because the body's motion is perpendicular to the direction of the centripetal force that is pulling on it. The force that keeps the body moving in a circular motion and is always pointed in the direction of the circle's centre is known as the centripetal force.
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