Masses 4 kg and 5 kg are connected by a string over a frictionless pulley; the 4 kg mass is on a frictionless table and 5 kg hangs. The acceleration of the 5 kg mass is:

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Masses 4 kg and 5 kg are connected by a string over a frictionless pulley; the 4 kg mass is on a frictionless table and 5 kg hangs. The acceleration of the 5 kg mass is:

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