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College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300

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Chapter
Section
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College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300
Textbook Problem

A car of mass 875 kg is traveling 30.0 m/s when the driver applies the brakes, which lock the wheels. The car skids for 5.60 s in the positive x-direction before coming to rest. (a) What is the car’s acceleration? (b) What magnitude force acted on the car during this time? (c) How far did the car travel?

(a)

To determine
The acceleration of the car.

Explanation

Given info: The mass of the car is 875.0 kg. The initial velocity of the car is 30.0 m/s. The car skids for 5.60 s. The final velocity of the car is 0.0 m/s.

From Newton’s equation of motion, the formula for acceleration is,

a=vfvit

  • vf is the final velocity of the car.
  • vi is the initial velocity of the car.
  • t is the time interval.

Substitute 0.0 m/s for vf , 30.0 m/s for vi and 5

(b)

To determine
The magnitude of force on the car.

(c)

To determine
The displacement of the car.

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