state the conditions under a force can do no work
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When force is perpendicular
For eg when we apply force on a wall
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work done = force × displacement
work done can become zero when either force acting on the object or displacement becomes zero. Also Wark done can be zero when force and displacement are perpendicular to each other
work done can become zero when either force acting on the object or displacement becomes zero. Also Wark done can be zero when force and displacement are perpendicular to each other
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