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1. Two masses are connected with a rope via a pulley. Mass m1 is 4.00 kg...

1. Two masses are connected with a rope via a pulley. Mass m1 is 4.00 kg and initially at rest on the floor. Mass m2 is 7.00 kg and initially is held at rest 2.00 m above the ground. Find the speed of m2 when it impacts the floor.

2. In each cycle of its operation, a heat engine expels 2,900 J of energy and performs 1,700 J of mechanical work. Find the thermal efficiency of the engine

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1 2kg Formular for Acceleration Ma-m, mitma 7-4 = 39 m/s² 9 +4 oo tato speed when it reaches the Hound can be calculoted as f

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