Why no work is done, when force acts at right angles to the direction of displacement.
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No work is done along a direction of motion if the force is perpendicular. When considering force parallel to the direction of motion, we omit the cosine term because it equals 1 which does not change the expression.
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Answer:
No work is done along a direction of motion if the force is perpendicular. When considering force parallel to the direction of motion, we omit the cosine term because it equals 1 which does not change the expression.
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