HW_8 - P112 Spring 2008 Homework #8 Reading: 6.5, 7.2-7.5,...

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P112 Spring 2008 Homework #8 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. Bill is going ice skating for the first time. He has gotten himself into the middle of an ice rink and cannot figure out how to make the skates work. Every motion he makes simply slips on the ice and leaves him in the same place he started. He decides that he
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HW_8 - P112 Spring 2008 Homework #8 Reading: 6.5, 7.2-7.5,...

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