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When 100 J of work are put into a device that puts out 40 J of useful work, the efficiency of the device is 40% 60% 140% 50% The power required to raise a 100 kg crate vertical distance of 2 m in 4s is? g = 10 m/s² (ignore friction) work = power x time 800 W 200 W 2000 W 500 W

When 100 J of work are put into a device that puts out 40 J of useful work, the efficiency of the device is 40% 60% 140% 50% The power required to raise a 100 kg crate vertical distance of 2 m in 4s is? g = 10 m/s² (ignore friction) work = power x time 800 W 200 W 2000 W 500 W

An Introduction to Physical Science
An Introduction to Physical Science
14th Edition
ISBN:9781305079137
Author:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres
Publisher:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres
Chapter4: Work And Energy
Section: Chapter Questions
Problem 1FIB: Work is equal to the force times the ___ distance through which the force acts. (4.1)
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I need help with this problem and an explanation for the solution described below. (University Physics 1: Work, Energy)

When 100 J of work are put into a device that puts out 40 J of useful work, the efficiency of the device is 40% 60% 140% 50%
Transcribed Image Text:When 100 J of work are put into a device that puts out 40 J of useful work, the efficiency of the device is 40% 60% 140% 50%
The power required to raise a 100 kg crate vertical distance of 2 m in 4s is? g = 10 m/s² (ignore friction) work = power x time 800 W 200 W 2000 W 500 W
Transcribed Image Text:The power required to raise a 100 kg crate vertical distance of 2 m in 4s is? g = 10 m/s² (ignore friction) work = power x time 800 W 200 W 2000 W 500 W
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