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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Complete Physics For Cambridge IGCSE RG

ISBN: 9780198308713

3rd Edition

Authors: Stephen Pople

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Question Posted: Aug 27, 2021 02:02 AM

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A crate of mass 300 kg is raised by an electric motor through a height of 60

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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

Complete Physics For Cambridge IGCSE RG

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