When is work said to be done against the force of gravity? State and define si unit of work.
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Work done by a body is against the applied force if the displacement is in a direction opposite to the force. In the case of gravity, if a body is lifted above the ground, work is done against gravity.
All bodies with mass are attracted towards the earth by gravity, so when a body is lifted one has to do work to raise it.
Work done against gravity = Force x Displacement = Weight x Height = mgh = gravitational potential energy stored in the body.
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Work done by a body is against the applied force if the displacement is in a direction opposite to the force. In the case of gravity, if a body is lifted above the ground, work is done against gravity.
All bodies with mass are attracted towards the earth by gravity, so when a body is lifted one has to do work to raise it.
Work done against gravity = Force x Displacement = Weight x Height = mgh = gravitational potential energy stored in the body.
If u like comment thanks
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