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A pulley system has an efficiency of 74.2%. If you perform 200 J of work, how much useful work does the pulley perform? A. 52 J B. 113 J C. 148 J D. 200 J SUBMI
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A pulley system has an efficiency of 74.2%. If you perform 200 J of work, how

much useful work does the pulley perform?
A. 52 J
B. 113 J
C. 148 J
D. 200 J
SUBMI

User PMerlet
by
5.4k points

1 Answer

5 votes

Answer:

C

Step-by-step explanation:

If a pulley system has an efficiency of 74.2%, then only that fraction of the work performed will be useful. 74.2%=0.742. 0.742*200 is about 148J. Hope this helps!

User Beej
by
5.5k points
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