q1 two railroad cars each of mass 6300 kg and, Physics

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q1 two railroad cars each of mass 6300 kg and

Q1. Two railroad cars, each of mass 6300 kg and travelling 88 km/h in opposite directions, collide head-on and come to rest. How much thermal energy is produced in this collision?

Q2. Speedboat A negotiates a curve whose radius is 115 m. Speedboat B negotiates a curve whose radius is 194 m. Each boat experiences the same centripetal acceleration. What is the ratio vA/vB of the speeds of boats?

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