A body of mass m falls down through a height h. Obtain an expression for the work done by the force of gravity.
A body of mass m falls down through a height h. Obtain an expression for the work done by the force of gravity.
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Let a body of mass m fall down through a vertical height h either directly or through an inclined plane e.g. a hill, slope or staircase. The force of gravity on the body is F = mg acting vertically downwards and the displacement in the direction of force (i.e., vertical) is S = h. Therefore the work done by the force of gravity is W = FS = mgh
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