A crate of mass 300 kg is raised by an electric motor through a height of 60
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A crate of mass 300 kg is raised by an electric motor through a height of 60 m in 45 s. Calculate:
a. The weight of the crane (g = 10 N/kg)
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 W from its electricity supply.
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Summary of answer 1 Weight W 3000 N 2 Work done is U 180 kJ 3 Power P ...View the full answer
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Naresh Prajapati
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