Quiz #2 (S05) c

Quiz #2 (S05) c - PHYSICS103 Name Row Second Quiz 10 March...

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PHYSICS 103 Name                                        Row           Second Quiz 10 March 2005 1. What average force is required to stop a 120-kg football player running at 8 m/s in a time of 0.4 s? a. 6 N b. 37.5 N c. 384 N d. 2400 N 2. A tailgunner jumped from a Lancaster bomber but did not break any bones or die because he fell into the branches of a tree and then into a snow bank. Physics explains this because a. the change in momentum was less than hitting the ground directly. b. the impulse in less in trees and snow than ground. c. the increased stopping time in the tree meant a smaller stopping force. d. the decreased stopping time in the tree meant a smaller stopping force. 3. What is the impulse of a 5 N force acting for 15 s? a. 3 N·s b. 15 N·s c. 20 N·s d. 75 N·s 4. Two air-track gliders are held together with a string. The mass of glider A is twice that of glider B. A spring is tightly compressed between the gliders. If the gliders are initially at rest and the spring is released by burning the string, what is the total momentum of both gliders after the release? a. twice the momentum of A
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This document was uploaded on 10/29/2011 for the course PHSX 103 at MSU Bozeman.

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Quiz #2 (S05) c - PHYSICS103 Name Row Second Quiz 10 March...

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