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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