A 1 200-kg car traveling initially with a speed of 25.0 m/s in an easterly direction crashes into the rear end of a 9,000kg truck moving in the same direction at 20.0 m/s. The velocity of the car right after the collision is 18.0 m/s to the east. (a) What is the velocity of the truck right after the collision? (b) Is total kinetic energy conserved before and after collisions? How much energy is lost? Where does the energy go?

A 1 200-kg car traveling initially with a speed of 25.0 m/s in an easterly direction crashes into the rear end of a 9,000kg truck moving in the same direction at 20.0 m/s. The velocity of the car right after the collision is 18.0 m/s to the east. (a) What is the velocity of the truck right after the collision? (b) Is total kinetic energy conserved before and after collisions? How much energy is lost? Where does the energy go?

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter11: Collisions

Section: Chapter Questions

Problem 80PQ

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Question

A 1 200-kg car traveling initially with a speed of 25.0 m/s in an easterly direction crashes into the rear end of a
9,000kg truck moving in the same direction at 20.0 m/s. The velocity of the car right after the collision is 18.0
m/s to the east.
(a) What is the velocity of the truck right after the collision?
(b) Is total kinetic energy conserved before and after collisions? How much energy is lost? Where does the
energy go?

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