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08/01/2021 4:28 pm
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A mass of 10 kg is at a point A on a table. It is moved to a point B. If the line joining A and B is horizontal, what is the work done on the object by the gravitational force? Explain your answer.
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08/01/2021 4:29 pm
Here, the mass of 10 kg is moved horizontally from point A to B. The force of gravity acts vertically downwards. Thus, the mass moves in a direction at right angle to the force of gravity. So, Work done on the object by the force of gravity = Fs cosθ = Fs cosθ 90° = 0 (∵ cos 90 = 0)
Therefore, no work is done by the force of gravity on the object.