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in Laws of motion by (48.4k points)
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Suppose that the mass of the suspended object is mA and the masses of the pulleys are mB = 0.3mA, mC = 0.2mA, and mD = 0.2mA. Show that the force T necessary for the system to be in equilibrium is 0.275mAg.

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From the free-body diagram of pulley C

Then from the free-body diagram of pulley B

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