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HW09_9 - P1112 Spring 2009 Homework#9 due second section of...

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P1112 Spring 2009 Homework #9 due second section of week of March 23. Quiz on HW#8 and HW#9 first section of week of March 30. Reading: Text 8.1 – 8.5 Not all concepts will be covered in class – you are responsible for all material in the reading and in the homework problems. Problems: 1. Y&F 8.38 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? 2. Y&F 8.102 A 20.0 kg-projectile is fired at an angle 60 0 above the horizontal and with a speed of 80.0 m/s. At the highest point of the trajectory the projectile explodes into two fragments of equal mass, one of which falls vertically with zero initial speed. Ignore air resistance. (a) How far from the point of firing does the other fragment strike the ground (level terrain)?
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