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A car is traveling at an initial speed of 20 m/s and slows to rest with an acceleration of -5.0 m/s. What is the stopping distance, in meters? Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.

A car is traveling at an initial speed of 20 m/s and slows to rest with an acceleration of -5.0 m/s. What is the stopping distance, in meters? Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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A car is traveling at an initial speed of 20 m/s and slows to rest with an acceleration of -5.0 m/s?. What is the stopping distance, in meters? Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.
Transcribed Image Text:A car is traveling at an initial speed of 20 m/s and slows to rest with an acceleration of -5.0 m/s?. What is the stopping distance, in meters? Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.
Expert Solution
Step 1

The initial speed of the car,(u)=20 m/sec -----(1) [Given]

Acceleration of the car,(a)=(-)5 m/sec2 -----(2) [Given]  [Case of retardation]

Final speed of the car,(v)=0 m/sec-----(3) [Car is stopping finally]

Let us consider the stopping distance be (s) in meter respectively.

Using the third equation of motion we get,

 

 

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