During an automobile crash test, a 1000 kg car is sent towards a cement wall at a speed of 14 m/sec and bounces off with a velocity of 7 m/s in the opposite direction. What is the change in momentum of the car?

During an automobile crash test, a 1000 kg car is sent towards a cement wall at a speed of 14 m/sec and bounces off with a velocity of 7 m/s in the opposite direction. What is the change in momentum of the car?

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter9: Momentum And Its Conservation

Section: Chapter Questions

Problem 77A

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Question

how would you solve this confusing

During an automobile crash test, a 1000 kg car is sent
towards a cement wall at a speed of 14 m/sec and bounces
off with a velocity of 7 m/s in the opposite direction. What
is the change in momentum of the car?
14,000 T
7,000 T
EAnswer
-21,000 T

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