Answer to Question #185980 in Mechanics | Relativity for buddy

Question #185980

A forklift is used to lift a large 704 kg crate a distance of 5.54 m in 6.12 s. What is the efficiency of the forklift if it takes a total of 8040 J/s of chemical energy in the form of burning fuel to complete this task?


1
Expert's answer
2021-04-29T07:27:55-0400

P1=mght=7049.85.546.12=6250 W,P_1=\frac{mgh}{t}=\frac{704\cdot 9.8\cdot 5.54}{6.12}=6250~W,

η=P1P2=62508040=0.78=78%.\eta=\frac{P_1}{P_2}=\frac{6250}{8040}=0.78=78\%.


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