exam 3A_111_F05

exam 3A_111_F05 - A Physics 111, Exam 3A Part I. Put the...

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Physics 111, Exam 3A A Part I . Put the answers to these 12 questions on your SCANTRON sheet. Your answer should be CLOSEST TO THE GIVEN 1) An 1800-kg car stopped at a traffic light is struck from the rear by a 900 -kg car and the two become entangled. If the smaller car was moving at 20m/s before collision, what is the speed of the entangled mass after the collision? a) 6.67 m/s b) 0 m/s c) 10.23 m/s d) 0.67 m/s e) 300 m/s 2) A body of mass 2.0-kg makes an elastic collision with another body at rest and continues to move in the original direction but with one fourth (1/4) of its original speed. What is the mass of the other body? a) 4.2-kg b) 1.2-kg c) 3.7-kg d) 0.6-kg e) 29-kg 3) Two titanium spheres approach each other head on with the same speed and collide elastically. After the collision, one of the spheres, whose mass is 300-g, remains at rest. What is the mass of the other sphere? a) 0.6-kg b) 0.1-kg c) 1.5-kg d) 2.9-kg e) 10.2-kg 4)
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This note was uploaded on 03/30/2012 for the course PHYS 111 taught by Professor Moro during the Spring '08 term at NJIT.

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exam 3A_111_F05 - A Physics 111, Exam 3A Part I. Put the...

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