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phys218-spring-2011-exam-2-practice

phys218-spring-2011-exam-2-practice - PHYS 218 Exam 2...

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PHYS 218, Exam 2 Name: (Last) (First) (Middle) 1. Record ”66” as your two-digit exam version number on the scantron form in the field “TEST/QUIZ NUMBER”. 2. Write your name here and on the scantron form. 3. Record your PUID number in the “STUDENT IDENTIFICATION NUMBER” field on your scantron form. 4. A numeric answer that is correct to within 1% error is considered correct. 5. For the acceleration due to gravity, please use g = 9 . 8 m/s 2 . 1
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1. A large truck is coasting along and plows into an initially stationary, much less massive Mini Cooper. After the collision, the Mini Cooper acquires the same final velocity as the truck. Which of the following statements is false? (a) The final momentum of the truck is larger than the final momentum of the car. (b) The initial momentum of the car is less than the initial momentum of the truck. (c) Kinetic energy is lost during this colli- sion. (d) The change in momentum of the truck is equal in magnitude and opposite in direction to the change in momentum of the car. (e) The change in velocity of the truck is equal in magnitude and opposite in direction to the change in velocity of the car.
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