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A railroad car of mass 21800 kg moving eastwards with a speed of 3.61 m/s collides and couples with another rail car of mass 41800 kg, moving in the same direction with a speed of 1.4 m/s. What is the speed of the two coupled cars after the collision? (make east positive)

A railroad car of mass 21800 kg moving eastwards with a speed of 3.61 m/s collides and couples with another rail car of mass 41800 kg, moving in the same direction with a speed of 1.4 m/s. What is the speed of the two coupled cars after the collision? (make east positive)

College Physics
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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I need help with number 5 please and round all numbers to three significant digits

4. A 0.317-kg ball traveling at 7.42 m/s west collides head on with a 1.02-kg ball moving in the opposite direction at a velocity of 10.2 m/s. The 0.317-kg ball rebounds at 15.6 m/s after the collision. Find the velocity of the second ball. (use west as the positive direction) 05. A railroad car of mass 21800 kg moving eastwards with a speed of 3.61 m/s collides and couples with another rail car of mass 41800 kg, moving in the same direction with a speed of 1.4 m/s. What is the speed of the two coupled cars after the collision? (make east positive)
Transcribed Image Text:4. A 0.317-kg ball traveling at 7.42 m/s west collides head on with a 1.02-kg ball moving in the opposite direction at a velocity of 10.2 m/s. The 0.317-kg ball rebounds at 15.6 m/s after the collision. Find the velocity of the second ball. (use west as the positive direction) 05. A railroad car of mass 21800 kg moving eastwards with a speed of 3.61 m/s collides and couples with another rail car of mass 41800 kg, moving in the same direction with a speed of 1.4 m/s. What is the speed of the two coupled cars after the collision? (make east positive)
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