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# HW_6 - P112 Spring 2008 Homework#6 Reading 5.3 5.4 5.5 14.3...

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P112 Spring 2008 Homework #6 Reading: 5.3, 5.4, 5.5, 14.3 Not all concepts will be covered in class – you are responsible for all material in the reading and in the homework problems. 1. A small remote-control car with mass 1.60 kg moves at a constant speed of v= 12.0 m/s in a vertical circle inside a hollow metal cylinder that has a radius of 5.00 m. What is the magnitude of the normal force exerted on the car by the walls of the cylinder at a) the bottom of the vertical circle and b) at the top of the vertical circle? 2. A 0.800-kg ball is tied to the end of a string 1.60 m long and swung in a vertical circle. a) During one complete circle, starting anywhere, calculate the total work done on the ball by i) the tension in the string, ii) gravity. b) Repeat part (a) for motion along a semicircle from the lowest to the highest point on the path. 2. A 4.80-kg watermelon is dropped from rest from the roof of a 25.0-m-tall building. a) Calculate the work done by gravity on the

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HW_6 - P112 Spring 2008 Homework#6 Reading 5.3 5.4 5.5 14.3...

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