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Avni Verma Grade:

Can there be an example, where a force acts continuously but work is not done?

8 years ago

Answers : (2)

Avijit Arya
33 Points
										Yes. there is a possible case, when the force is perp. to disp. as in that case the dot product of theirs, i.e. work gives zero as result. For eg. Uniform circular motion.
8 years ago
AskiitianExpert Pramod-IIT-R
47 Points
										Work can be zero even when there is a force. The centripetal force in a uniform circular motion, for example, does zero work because the kinetic energy of the moving object doesn't change. Likewise when a book sits on a table, the table does no work on the book despite exerting a force equivalent to mg upwards, because no energy is transferred into or out of the book.

The work done by a force acting on an object depends on the inertial frame of reference, because the distance covered while applying the force does. Due to Newton's law of reciprocal actions there is a reaction force; it does work depending on the inertial frame of reference in an opposite way. The total work done is independent of the inertial frame of reference.
8 years ago
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