A porter lifts a luggage of 20 kg from the ground and puts it on his head 3.0m above the ground. After keeping it on his head he walks 10 meters. Calculate the total work done by him on the luggage
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Total work done = mgh = 20×9.8×3 = 588J
No work is being done when he is moving horizontally, since the displacement is at right angle to the direction of the force
No work is being done when he is moving horizontally, since the displacement is at right angle to the direction of the force
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