Railroad Car
A 9000 kg railroad car moving at 3m/s strikes a stationary (not moving) 5000 kg railroad car?
(a) What is the kinectic energy of the 9000 kg railroad car before the collison?
(b) What is the momentum of the 9000 kg railroad car before the collision?
(c) If the two railroad cars couple and move off together after the collision, what is their velocity?
a) KE = 1/2 m v² = 1/2 * 9000 * 3² = 40500 J
b) p = mv = 9000 * 3 = 27000 kg-m/s
c) p = mv; v = p/m = 27000 / (9000+5000) = 1.9 m/s
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April 25th, 2010 in
Uncategorized | tags: car, railroad, railroad car dimensions, railroad careers, railroad cars, railroad cars for sale, railroad cart coffee table, trains, transportation, travel
