A Porter lifts a suitcase weighing 20kg from the Above plot form and put it on his head 2.0above the plot form. Work done by porter on suitcase is

work done by the porter on the luggage= force multiply by displacement
                                                                = mgh
                                                               = 20 kg multiply (9.8 m/s square) multiply 2.0
                                                               = 392
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