20. A small electric motor is used to raise a weight of 2.0 N through a vertical height of 80 cm in 4.0 s. The efficiency of the motor is 20 %. What is the electrical power supplied to the motor? A. 0.080 W B. 0.80 W C. 2.0 W D. 200 W [C]

20. A small electric motor is used to raise a weight of 2.0 N through a vertical height of 80 cm in 4.0 s. The efficiency of the motor is 20 %. What is the electrical power supplied to the motor? A. 0.080 W B. 0.80 W C. 2.0 W D. 200 W [C]

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter7: Work, Energy, And Energy Resources

Section: Chapter Questions

Problem 33PE: What is the cost of operating a 3.00-W electric clock for a year if the cost of electricity is...

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20. A small electric motor is used to raise a weight of 2.0 N through a vertical height of 80 cm in 4.0 s. The
efficiency of the motor is 20 %. What is the electrical power supplied to the motor?
A. 0.080 W
B. 0.80 W
C. 2.0 W
D. 200 W [C]

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