An electric motor is used to raise a load vertically.

PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

An electric motor is used to raise a load vertically. (i) The motor is rated

600\,\text{W}

. Calculate the work it can perform in

3\,\text{min}

. Give your answer in joule. (ii) If the motor actually performs only

90\%

of the work calculated in part (i) because of energy losses, how much work is lost to the surroundings?