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SerwayPSE8_ch09PROBS_FINAL

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Serway/Jewett: PSE 8e Problems Set – Ch. 09 - 1 Serway/Jewett, Physics for Scientists and Engineers, 8/e PSE 8e – Chapter 09 Linear Momentum and Collisions Questions & Problems Objective Questions       denotes answer available in  Student Solutions Manual/Study  Guide   1.  A car of mass  m  traveling at speed  v  crashes into the rear of a truck  of mass 2 m  that is at rest and in neutral at an intersection. If the  collision is perfectly inelastic, what is the speed of the combined car  and truck after the collision? (a)  v (b)  v /2 (c)  v /3 (d) 2 v (e)  None of those answers is correct. 2.  A head-on, elastic collision occurs between two billiard balls of  equal mass. If a red ball is traveling to the right with speed  v  and a  blue ball is traveling to the left with speed 3 v  before the collision,  what statement is true concerning their velocities subsequent to the  collision? Neglect any effects of spin. (a) The red ball travels to the  left with speed  v , while the blue ball travels to the right with speed 3 v (b) The red ball travels to the left with speed  v , while the blue ball  continues to move to the left with a speed 2 v . (c) The red ball travels 
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Serway/Jewett: PSE 8e Problems Set – Ch. 09 - 2 to the left with speed 3 v , while the blue ball travels to the right with  speed  v . (d) Their final velocities cannot be determined because  momentum is not conserved in the collision. (e) The velocities cannot  be determined without knowing the mass of each ball.  3.  A 3-kg object moving to the right on a frictionless, horizontal  surface with a speed of 2 m/s collides head-on and sticks to a 2-kg  object that is initially moving to the left with a speed of 4 m/s. After  the collision, which statement is true? (a) The kinetic energy of the  system is 20 J. (b) The momentum of the system is 14 kg   m/s. (c)  The kinetic energy of the system is greater than 5 J but less than 20 J.  (d) The momentum of the system is –2 kg   m/s. (e) The momentum  of the system is less than the momentum of the system before the  collision.  4.  A 2-kg object moving to the right with a speed of 4 m/s makes a  head-on, elastic collision with a 1-kg object that is initially at rest. The  velocity of the 1-kg object after the collision is (a) greater than 4 m/s,  (b) less than 4 m/s, (c) equal to 4 m/s, (d) zero, or (e) impossible to  say based on the information provided.  5.  A 5-kg cart moving to the right with a speed of 6 m/s collides with 
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Serway/Jewett: PSE 8e Problems Set – Ch. 09 - 3 a concrete wall and rebounds with a speed of 2 m/s. What is the 
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