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: 4.0 kg, 4.0 kg, and 6.0 kg. They can drop 1.3 meters. How much energy does the clock use in a week?  a. 51 J b. 76 J c. 127 J d. 178 J

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Q: 43. A 200 g mass stretches a spring 40 cm. How much Potential energy does the spring have? A. .392 J…

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Q: In the figure, a block of mass m = 15 kg is released from rest on a frictionless incline of angle 0…

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Q: In the figure, a block of mass m = 3.90 kg slides head on into a spring of spring constant k = 320…

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Q: /m. How far must the spring be compressed for 3.50 J of potential energy to be stored in it? Express…

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Q: In the figure, a block of mass m = 15 kg is released from rest on a frictionless incline of angle 0…

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Q: #71

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