rev7sp10 - TA: Tomoyuki Nakayama February 22nd February...

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TA: Tomoyuki Nakayama February 22 nd – February 23 rd , 2010 PHY 2048: Physics 1 with Calculus, Spring 2010 Review: Chapter 9.1-9.11 The purpose of this review is to refresh your memory. Physics is a cumulative subject, so make it sure that you understand basic concepts and typical problem solving techniques in previous chapters before moving on to a new chapter. ________________________________________________________________________________ A. Center of Mass 1. Three uniform thin rods form an inverted U as shown on the right, where L = 20 cm. The horizontal rod has mass M = 40g and each vertical rod has mass m = 30 g. Find the center of mass of the system. B. Impulse-Momentum Theorem 1. A 2-kg ball drops vertically onto a floor, hitting the floor with a speed of 20 m/s. It rebounds with a speed of 10 m/s. If the ball is in contact w/ the floor for 0.05s, what is the average force exerted on the ball by the floor? 2. A 100-kg man on a frictionless surface fires a gun and a 0.01-kg bullet is shot at a speed of 500 m/s. What speed does the man acquire? C. Collisions 1. In the figure on the right, block 1 of mass 3-kg hits block 2 of mass 2 kg with a speed of 5m/s. The block 2 is initially at rest. Then they stick together and slide on a frictionless surface. The
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rev7sp10 - TA: Tomoyuki Nakayama February 22nd February...

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