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Is it possible to have a non-zero net force on an object that does no work...

Is it possible to have a non-zero net force on an object that does no work on the object? if not, explain why. if so, provide an example.
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Answer #1

Yes, it is possible.

When a charge particle undergoes circular motion in the region of external magnetic field, the magnetic force acts as a centripetal force, which is perpendicular to the velocity, therefore the magnetic force doesn't do any work, and there is no change in kinetic energy of the charge particle.

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