Answered: a) A train that weighs 4.5x106 kg…

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter10: Systems Of Particles And Conservation Of Momentum

Section: Chapter Questions

Problem 41PQ: There is a compressed spring between two laboratory carts of masses m1 = 105 g and m2 = 212 g....

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a) A train that weighs 4.5x106 kg traveling at 20 m/s applies its breaks. The braking force is 15 MN (MegaNewtons). How many minutes does it take the train to stop?
b) One car (2000 kg) is traveling in the positive x direction with a speed of 20 m/s and a second car (2500 kg) is traveling in the negative x direction with a speed of 15 m/s. The two cars collide directly into each other. If the final velocity after the collision of the second car is +1.8 m/s, what
it the final velocity of the first car?
c) A 40 gram bullet is shot from a gun and accelerates from rest to a velocity of 550 m/s in 2 milliseconds. What is the average force exerted by the gun on the bullet?

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