Learning Goal: To practice Problem-Solving Strategy 2.1 for constant acceleration problems. A car is traveling at a constant velocity of magnitude v0v0 when the driver notices a garbage can on the road in front of him. At that moment, the distance between the garbage can and the front of the car is ddd. A time treacttreact after noticing the garbage can, the driver applies the brakes and slows down at a constant rate before coming to a halt just before the garbage can. What is the magnitude of the car's acceleration after the brakes are applied? PROBLEM-SOLVING STRATEGY 2.1 Kinematics with constant acceleration MODEL: Model the object as having constant acceleration. VISUALIZE: Use different representations of the information in the problem. Draw a pictorial representation. This helps you assess the information you are given and starts the process of translating the problem into symbols. Use a graphical representation if it is appropriate for the problem. Go back and forth between these two representations as needed. SOLVE: The mathematical representation is based on the three kinematic equations vfs=vis+asΔtvfs=vis+asΔt, sf=si+visΔt+12as(Δt)2sf=si+visΔt+12as(Δt)2, and v2fs=v2is+2asΔsvfs2=vis2+2asΔs. Use xxx or yyy, as appropriate to the problem, rather than the generic sss. Replace ii and ff with numerical subscripts defined in the pictorial representation. REVIEW: Check that your result has the correct units and significant figures, is reasonable, and answers the question. Part A Below is a sketch of the situation described in this problem, along with four different motion diagrams. Which of these diagrams is the correct pictorial representation of the problem?

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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Learning Goal:

To practice Problem-Solving Strategy 2.1 for constant acceleration problems.

A car is traveling at a constant velocity of magnitude v0v0 when the driver notices a garbage can on the road in front of him. At that moment, the distance between the garbage can and the front of the car is ddd. A time treacttreact after noticing the garbage can, the driver applies the brakes and slows down at a constant rate before coming to a halt just before the garbage can. What is the magnitude of the car's acceleration after the brakes are applied?

PROBLEM-SOLVING STRATEGY 2.1 Kinematics with constant acceleration

MODEL: Model the object as having constant acceleration.

VISUALIZE: Use different representations of the information in the problem.

Draw a pictorial representation. This helps you assess the information you are given and starts the process of translating the problem into symbols.
Use a graphical representation if it is appropriate for the problem.
Go back and forth between these two representations as needed.

SOLVE: The mathematical representation is based on the three kinematic equations

vfs=vis+asΔtvfs=vis+asΔt,

sf=si+visΔt+12as(Δt)2sf=si+visΔt+12as(Δt)2, and

v2fs=v2is+2asΔsvfs2=vis2+2asΔs.

Use xxx or yyy, as appropriate to the problem, rather than the generic sss.
Replace ii and ff with numerical subscripts defined in the pictorial representation.

REVIEW: Check that your result has the correct units and significant figures, is reasonable, and answers the question.

Part A

Below is a sketch of the situation described in this problem, along with four different motion diagrams. Which of these diagrams is the correct pictorial representation of the problem?

I Review
Below is a sketch of the situation described in this problem, along with four different motion
diagrams. Which of these diagrams is the correct pictorial representation of the problem?
Learning Goal:
To practice Problem-Solving Strategy 2.1 for
constant acceleration problems.
(a)
a = 0
A car is traveling at a constant velocity of
magnitude vo when the driver notices a
garbage can on the road in front of him. At that
moment, the distance between the garbage can
and the front of the car is d. A time treact after
noticing the garbage can, the driver applies the
brakes and slows down at a constant rate
(b)
(c)
a = 0
before coming to a halt just before the garbage
can. What is the magnitude of the car's
acceleration after the brakes are applied?
(d)
a = 0
Hit brakes
See can
Stop
(b)
(c)
(d)
Submit
Previous Answers Request Answer
X Incorrect; Try Again; 5 attempts remaining
This diagram shows the velocity increasing as the car approaches the garbage can. Is this
what you would expect when you apply the brakes?

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