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A mass of 10 kg is at a point A on a tab...

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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The correct Answer is:
The work done on the object by the gravitational force is 0.
Here, the displacement AB is horizontal. So, there is no difference in height.
`therefore h=0`. The gravitational force, acts vertically downwards.
`w=mgh` (`because` Here, W = the work done by gravitational force)
`=mgxx0=0`
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Knowledge Check

  • A particle of mass 10 g is kept of the surface of a uniform sphere of mass 100 kg and radius 10 cm. Find the work to be done against the gravitational force between them to take the particle far away from the sphere. (Take G = 6.67 xx 10^(-11) Nm^(2)//kg^(2) ?

    A
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    B
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