jessicagao0416 jessicagao0416

07-12-2022
Physics

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A crate of mass 200 is raised by an electric motor through a height of 50 in 25. Calculate:
a) The weight of the crane
b) The useful work done
c) The useful power of the motor
d) The efficiency of the motor, if it takes a power of 5000 from its electricity
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