P1112 Fall 2008 Homework #10 Reading: 6.5, 7.2-7.5, 8.1-8.3 Not all concepts will be covered in class – you are responsible for all material in the reading and in the homework problems. Problems:1. After a winter storm a 1400-kg car going west on Buffalo Street at 35.0 km/h collides with a 2800-kg truck going south across Buffalo at 50.0 km/h. If they become coupled on collision, what are the magnitude and direction of their velocity after colliding? You can ignore forces between the vehicles and the icy road. 2. A 5.00 g bullet is fired horizontally into a 1.20-kg wooden block resting on a horizontal surface. The coefficient of kinetic friction between the block and surface is 0.20. The bullet remains embedded in the block which is observed to slide 0.230 m along the surface before stopping. What was the initial speed of the bullet? 3. How much work is required to move a satellite, orbiting earth, from a circular orbit of radius R1to one of radius R2?
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