A 0.455 kg cart is allowed to roll smoothly (w/out friction) on a track. At the end of the track is a pulley. A 0.75 kg mass hangs over the pulley by a string tied to the cart. The hanging mass is initially 0.33 m above the floor. The pulley is a solid disk with a mass of 0.25 kg and a radius of 0.025 m. The system is released from rest. How fast is the cart moving when the hanging mass reaches the floor?

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