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A car of mass m moving at a speed v 1 collides and couples with the back of a truck of mass 2 m moving initially in the same direction as the car at a lower speed v 2 . (a) What is the speed v f of the two vehicles immediately after the collision? (b) What is the change in kinetic energy of the car–truck system in the collision?

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Physics for Scientists and Enginee...

9th Edition
Raymond A. Serway + 1 other
Publisher: Cengage Learning
ISBN: 9781305116399

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Chapter
Section
BuyFindarrow_forward

Physics for Scientists and Enginee...

9th Edition
Raymond A. Serway + 1 other
Publisher: Cengage Learning
ISBN: 9781305116399
Chapter 9, Problem 9.24P
Textbook Problem
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A car of mass m moving at a speed v1 collides and couples with the back of a truck of mass 2m moving initially in the same direction as the car at a lower speed v2. (a) What is the speed vf of the two vehicles immediately after the collision? (b) What is the change in kinetic energy of the car–truck system in the collision?

(a)

To determine

The speed vf of the two vehicles immediately after the collision.

Explanation of Solution

The mass of car is m, and the initial speed of the car is v1, the mass of truck is 2m and the initial speed of the car is v2.

Use the law of conservation of momentum.

  mv1+2mv2=(m+2m)vfvf=13×

(b)

To determine

The change in kinetic energy of the car-truck system in the collision.

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Chapter 9 Solutions

Physics for Scientists and Engineers, Technology Update (No access codes included)
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