Asked by Joshua

A machine with v.r 5 was used to raise a load of 1.2kg mass through high of 10m. If the workdone to raise the load is 800j find usefull work output, find efficiency,and m.a of the machine
Answered by Damon
work output = m g h = 1.2 * 9.81 * 10 = 117 Joules
efficiency = 117/800 = .147 = 14.7%
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