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Answer to Question #110511 in Physics for Brekken Mandt

Question #110511
How much work must be put into a machine that is 70.0% efficient in order to move a mass of 400.0 kg a distance of 12.5 m?
1
Expert's answer
2020-04-20T10:42:49-0400
"\\eta W=mgh"

"0.7W=(400)(9.8)(12.5)"

"W=70000\\ J=70.0\\ kJ"


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