quiz3_sp10_sol

quiz3_sp10_sol - Physics 101 Classical Physics Spring 2010...

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Unformatted text preview: Physics 101 Classical Physics Spring 2010 Quiz 3 Instructions : The answer sheets must be handed in as soon as time is called. You have until 9:20am. Answer the following two multiple choice questions. Each question is worth 5 points. Use the following information for the next two questions. Captain Kirk, whose mass is 100 kg, is floating outside the Starship Enterprise, far away from any planets or stars. The Enterprise has a mass of 1 × 10 10 kg, and Captain Kirk pushes on the Enterprise with a force of 10 N. 1. If Captain Kirk is not attached to anything, which of the following describes what happens during the time he is pushing (and in contact with) the Enter- prise? (a) The Enterprise remains stationary, but Captain Kirk accelerates away from it with a = 0 . 1 m/s 2 . (b) The Enterprise feels a force of 10 N, but Captain Kirk feels a force much greater than 10 N acting on him. (c) Both the Enterprise and Captain Kirk accelerate away from each other with a = 0 . 1 m/s 2 . (d) Both Captain Kirk and the Enterprise accelerate away from each other, but the Enterprise has a much smaller acceleration. (e) Captain Kirk feels a force of 10 N but the Enterprise feels a much greater force. Newton’s Third Law tells us that the force exerted by Kirk on the Enterprise is exactly equal (but opposite in direction) to the force exerted by the Enterprise back on him. The acceleration that each will have, however, are very different, because Newton’s Second Law tells us that a = F/m . So the Enterprise will accelerate at a very tiny rate compared to Kirk, and therefore the answer is d . 2. When Captain Kirk is no longer in contact with the Enterprise, which of the following describes his motion?...
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quiz3_sp10_sol - Physics 101 Classical Physics Spring 2010...

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