A speeding train (with mass 444,000 kg) is moving east with speed 88.9 m/s. Superman (with mass 90.7 kg) needs to stop the train, (so it doesn't fly off the edge of a cliff!) so he flies directly west toward the train. When he reaches the train, he holds it tightly, and they come to a complete stop in 3.25 s. Coordinate system: • east is in the positive x direction • west is in the negative x direction Question 1 What kind of collision is this? elastic inelastic Question 2 What is the sign of the initial momentum of the train? O positive negative Question 3 What is the sign of the initial momentum of Superman? O positive O negative

A speeding train (with mass 444,000 kg) is moving east with speed 88.9 m/s. Superman (with mass 90.7 kg) needs to stop the train, (so it doesn't fly off the edge of a cliff!) so he flies directly west toward the train. When he reaches the train, he holds it tightly, and they come to a complete stop in 3.25 s. Coordinate system: • east is in the positive x direction • west is in the negative x direction Question 1 What kind of collision is this? elastic inelastic Question 2 What is the sign of the initial momentum of the train? O positive negative Question 3 What is the sign of the initial momentum of Superman? O positive O negative

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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In a game of baseball, a 1.0-kg ball is pitched to Sarah at 20 m/s. She hits the ball back to the pitcher at the same speed. If her bat was in contact with the ball for 0.10 s, what is the magnitude of the average force the bat exerted? a) 40 N b) 400 N c) 200 N d) 800 N
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