find the work done when a 25 kg (1)lifted to a vertical height of 2.0M from the ground (2)carried to the same place by pusing it up an inclined plane making an angle of 30°with the ground take g equal to 9.8ms-2.
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Gravitational force is a conservative force. Therefore, work done by the force is negative of the work done by the gravitational force if the body is stationary before and after the lift i.e. change in kinetic energy is zero. Therefore, the work done in both cases is (25*9.8*2)Joules=490 Joules
madhusinghms958:
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