Physics

Physics

Problem

A porter walks 50 m50\,\text{m} along a level road carrying a suitcase on his head at constant speed. What is the work done by the gravitational force on the suitcase during this walk? a) +mg×50 J+mg \times 50\,\text{J} b) Cannot be determined as mm is not given c) 00 d) −mg×50 J-mg \times 50\,\text{J}

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