Efficiency
About the Lecture
The lecture Efficiency by Jared Rovny, PhD is from the course Work.
Included Quiz Questions
Given 50 J of input work, a machine produces an output work of 25 J. What is the efficiency of the machine?
- 50%
- 25%
- 200%
- 100%
- 10%
A box with mass m = 10 kg is pushed up a slope to a height of h = 10 m. The slope makes a θ = 30° angle with the horizontal and the friction force along the slope is F_f = 5 N. What is the input work done on the box? (Useful relations: sin(30°) = 0.5 , g = 9.8 m/s² )
- Input work = 1080 J
- Input work = 980 J
- Input work = 1030 J
- Input work = 590 J
- Input work = 490 J
A box with mass m = 10 kg is pushed up a slope to a height of h = 10 m. The slope makes a θ = 30° angle with the horizontal and the friction force along the slope is F_f = 5 N. What is the efficiency? (Useful relations: sin(30°) = 0.5 , g = 9.8 m/s² )
- Efficiency = 91 %
- Efficiency = 100 %
- Efficiency = 50 %
- Efficiency = 95 %
- Efficiency = 88 %
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Author of lecture Efficiency
Jared Rovny, PhD
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