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Q.

Is it true that work done by a man holding a suitcase in his hand at rest is zero?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is True.
Work is said to be done when a force applied results in the displacement of a body. The man holding the suitcase at rest is not doing any work (zero work done), as there is no displacement of an object. No, the individual is not working because displacement is zero. And in the given instance, the person is merely standing. But lifting the bag against Earth's gravity requires using the person's energy.
 
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