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A frictionless pulley with zero mass is attached to the ceiling, in a gravity field of 9.81 m/s2. Mass M2 = 0.15 kg is being accelerated downward at 1.5 m/s2.

Calculate the mass M1.

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exactly how are the masses affixed to the pulley?

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with massless strings

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is mass1 and mass2 on opposite sides of the pulley?

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