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A force can do no work on a body, yet the body can move under accelerated motion.

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in Engineering Physics I by (558k points)
A force can do no work on a body, yet the body can move under accelerated motion.

(a) True

(b) False

This question was posed to me in exam.

Question is taken from Conservation of Energy topic in division Laws of Motion of Engineering Physics I

1 Answer

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Correct option is (a) True

The explanation: When the force is perpendicular to the direction of motion, the force can do no work on a body even if it is under accelerated motion. The moon revolves around the earth under the centripetal force of attraction of the earth, but the earth does not work on the moon.

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