When is the work done by a force on a body said to be zero? Give two examples.
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Answer:Negative work is performed if the displacement is opposite to the direction of the Force applied. Example: Work was done the gravity on a rocket going perpendicular upwards. Zero work: When force and displacement are perpendicular to each other, or when force or displacement is zero.
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When the force applied is not enough to overcome the irregularities and there is no impact or change in the object
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