A 1500kg car is speeding down the road at an eye-watering 120m/s when it slams on its braker, stopping in only 8 seconds. How much momentum does the car possess while its moving at 120 m/s? How much force does it take to stop the car in 8 seconds?

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 4STP
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A 1500kg car is speeding down the road at an eye-watering 120m/s when it slams on its braker, stopping in only 8 seconds. How much momentum does the car possess while its moving at 120 m/s? How much force does it take to stop the car in 8 seconds?
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Step 1

Given data

  • The mass of the car is given as m = 1500 kg.
  • The initial speed of the car is given as u  = 120 m/s.
  • The time taken by the car to stop is given as t = 8 sec.

 

 

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