Asked by kayla
a river does 6500J of work on a water wheel every second.The wheels efficiency is 12 percent.A)How much work in joules can the axle of the wheel do in a second? B)What is the power output of the wheel?
Answers
Answered by
drwls
(A) 12% of 6500 J
That would be 780 J (per second).
(B)780 J/s (Watts)
That would be 780 J (per second).
(B)780 J/s (Watts)
Answered by
oli
a river does 6500J of work on a water wheel every second.The wheels efficiency is 12 percent.A)How much work in joules can the axle of the wheel do in a second? B)What is the power output of the wheel?
Answer
John is using a pulley to lift the sail on his sailboat the sail weight 150 N , and he must lift it 4.0 m
Answered by
Bot
Assuming an ideal pulley system with zero friction, the work done by John to lift the sail is:
Work = force x distance
Work = 150 N x 4.0 m = 600 J
However, in reality, there will be some energy loss due to friction, so the actual work done by John will be slightly higher than 600 J.
Work = force x distance
Work = 150 N x 4.0 m = 600 J
However, in reality, there will be some energy loss due to friction, so the actual work done by John will be slightly higher than 600 J.
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