# ass11 - Practice Problems 11 1 A car tire is 57.1 cm in...

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Practice Problems 11 1 A car tire is 57.1 cm in diameter. The car is travelling at a speed of 23.2 m/s. What is the tire's rotation frequency, in rpm? (Do not enter a unit with your answer.) Answer: 7.76e+02 2 . What is the speed of a point at the top edge of the tire? Answer: 4.64e+01 m/s 3 . What is the speed of a point at the bottom edge of the tire? Answer: 0.0 m/s 4 . A 6.28 cm diameter, 340.0 g sphere is released from rest at the top of a 2.10 m long, 24.5° incline. It rolls, without slipping, to the bottom. What is the sphere's angular velocity at the bottom of the incline? Answer: 1.11e+02 rad/s 5 . What fraction of its kinetic energy is rotational? (Enter your answer in decimal form, do not include a unit.) Answer: 2.86e-01 6 . Far out in space, a mass 1 =125500.0 kg rocket and a mass 2 = 236000.0 kg rocket are docked at opposite ends of a motionless 96.0 m long connecting tunnel. The tunnel is rigid and has a mass of 13000.0 kg. How far from the 125500.0 kg rocket is the center of

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ass11 - Practice Problems 11 1 A car tire is 57.1 cm in...

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