An Atwood machine consists of a massless string connecting two masses over a massless, frictionless pulley ( the figure on the left below ). The masses are 1.70 and 1.65 kg. The system is released from rest with the 1.7-kg mass 2.15 m above the floor and the 1.65-kg mass on the floor. (a) What is the acceleration of the 1.7-kg mass? Of the 1.65-kg mass? (b) What is the speed of the 1.7-kg mass just before it hits the floor? (c) How long does it take the 1.7- kg mass to reach the floor?

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