185
Question
A mass of10 kg is at a point A on a table. It is moved to a point B. If theline joining A and B is horizontal, what is the work done on theobject by the gravitational force? Explain your answer.
A mass of10 kg is at a point A on a table. It is moved to a point B. If theline joining A and B is horizontal, what is the work done on theobject by the gravitational force? Explain your answer.
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Solution
Workdone by gravity depends only on thevertical displacement of the body. It does not depend upon the pathof the body. Therefore, work done by gravity is given by theexpression,
W= mgh
Where,
Verticaldisplacement, h =0
∴W= mg ×0 = 0
Hence,the work done by gravity on the body iszero.
Workdone by gravity depends only on thevertical displacement of the body. It does not depend upon the pathof the body. Therefore, work done by gravity is given by theexpression,
W= mgh
Where,
Verticaldisplacement, h =0
∴W= mg ×0 = 0
Hence,the work done by gravity on the body iszero.
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