Railroad cars collide: momentum conserved. A 10,000-kg railroad car, A, traveling at a speed of 24.0 m/s strikes an identical car, B, at rest. If the cars lock together as a result of the collision, what is their common speed just afterward? See Fig. 7-5. APPROACH We choose our system to be the two railroad cars. We consider a very brief time interval, from just before the collision until just after, so that external forces such as friction can be ignored. Then we apply conservation of momentum. FA 24.0 m/s (at rest) (a) Before collision -3. (b) After collision
Railroad cars collide: momentum conserved. A 10,000-kg railroad car, A, traveling at a speed of 24.0 m/s strikes an identical car, B, at rest. If the cars lock together as a result of the collision, what is their common speed just afterward? See Fig. 7-5. APPROACH We choose our system to be the two railroad cars. We consider a very brief time interval, from just before the collision until just after, so that external forces such as friction can be ignored. Then we apply conservation of momentum. FA 24.0 m/s (at rest) (a) Before collision -3. (b) After collision
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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Transcribed Image Text:Railroad cars collide: momentum conserved. A 10,000-kg
railroad car, A, traveling at a speed of 24.0 m/s strikes an identical car, B. at
rest. If the cars lock together as a result of the collision, what is their common
speed just afterward? See Fig. 7-5.
APPROACH We choose our system to be the two railroad cars. We consider a very
brief time interval, from just before the collision until just after, so that external
forces such as friction can be ignored. Then we apply conservation of momentum.
PA
24.0m/s
(a) Before cellisron
(h) Atter collsson
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