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Q. A 2.0 kg mass (mA) and a 5.50 kg mass (mB) are connected to a lightweight cord that passes over a frictionless pulley. The pulley only changes the direction of the force exerted by the rope. The hanging masses are free to move. Select coordinate systems for two masses with the positive direction up for mA and down for mB. What is the acceleration of the smaller mass?

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