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Chris9889:
You use an inclined plane to move furniture into a truck. You perform 352 kj of work, but only do 229 kj of useful work. What is the efficiency of the inclined plane?
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jhonyy9:
any idea ? do you know formula what you need using here ?
Vocaloid:
efficiency = (useful work done by the system)/(total work put into the system) * 100%
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