Asked by Anonymous

Old fashioned pendulum clocks are powered by masses that need to be wound back to the top of the clock about once a week to counteract energy lost due to friction and to the chimes. One particular clock has three masses: 4kg, 4kg and 6kg. They can drop 1.3 meters . How much energy does the clock use in a week?
A. 51J
B. 76J
C. 127J
D. 178J
Answered by bobpursley
what is it about this you do not understand? I have already taken the course, it is your turn. I will be happy to critique your thinking and work.
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