P1112 Fall 2008 Homework #7 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. The International Space Station (ISS) orbits the Earth in an approximately circular orbit at a height of about 240 miles (384 km) above the Earth's surface. (a) What is the speed of the space station in its orbit (in km/s)? (b) What is the space station's orbital period (in hours)? 3. A neutral buoyancy torpedo of mass M=100kg is fired horizontally from one submarine to another. [Neutral buoyancy means that the buoyancy force
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