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Zarrin [17]
3 years ago
13

A 1.00 x 104 W electric motor is used to lift a

Physics
1 answer:
Alexus [3.1K]3 years ago
4 0

Answer: 52%

Explanation:

1W = 1 J/s

motor input is 10000 J/s

Potential energy change

PE = 955(9.81)(25.0) = 234,213.75

power needed to change the PE in that time

P = 234,213.75/ 45 = 5,204.75 Watts

motor is 5204.75 / 10000 = 0.520475 or 52% efficient

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