/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 25 If a car traveling at \(28 \math... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 2: Problem 25

If a car traveling at \(28 \mathrm{m} / \mathrm{s}\) is brought to a full stop in \(4.0 \mathrm{s}\) after the brakes are applied, find the average acceleration during braking.

Short Answer

Expert verified
Answer: The average acceleration during braking is -7 m/s虏.

Step by step solution

01

Identify the given values

The given values are: Initial velocity (vi) = 28 m/s Final velocity (vf) = 0 m/s (since the car comes to a full stop) Time taken (t) = 4.0 s
02

Write down the formula for average acceleration

The formula for average acceleration (a) is: a = (vf - vi) / t
03

Substitute the given values into the formula and solve

We plug in the given values into the formula: a = (0 - 28) / 4.0
04

Calculate the average acceleration

Performing the calculations: a = -28 / 4.0 a = -7 \mathrm{m/s^2}
05

Final Answer

The average acceleration during braking is -7 m/s虏. Note that the negative sign indicates that the car is decelerating, or slowing down.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

A chipmunk, trying to cross a road, first moves \(80 \mathrm{cm}\) to the right, then \(30 \mathrm{cm}\) to the left, then \(90 \mathrm{cm}\) to the right, and finally \(310 \mathrm{cm}\) to the left. (a) What is the chipmunk's total displacement? (b) If the elapsed time was \(18 \mathrm{s},\) what was the chipmunk's average speed? (c) What was its average velocity?
In the problems, please assume the free-fall acceleration $g=9.80 \mathrm{m} / \mathrm{s}^{2}$ unless a more precise value is given in the problem statement. Ignore air resistance. 56\. (a) If a freestyle swimmer traveled \(1500 \mathrm{m}\) in a time of $14 \mathrm{min} 53 \mathrm{s},$ how fast was his average speed? (b) If the pool was rectangular and \(50 \mathrm{m}\) in length, how does the speed you found compare with his sustained swimming speed of \(1.54 \mathrm{m} / \mathrm{s}\) during one length of the pool after he had been swimming for 10 min? What might account for the difference?
An \(1100-\mathrm{kg}\) airplane starts from rest; \(8.0 \mathrm{s}\) later it reaches its takeoff speed of \(35 \mathrm{m} / \mathrm{s} .\) What is the average acceleration of the airplane during this time?
please assume the free-fall acceleration \(g=9.80 \mathrm{m} / \mathrm{s}^{2}\) unless a more precise value is given in the problem statement. Ignore air resistance. Grant Hill jumps \(1.3 \mathrm{m}\) straight up into the air to slamdunk a basketball into the net. With what speed did he leave the floor?
A car is speeding up and has an instantaneous velocity of $1.0 \mathrm{m} / \mathrm{s}\( in the \)+x\( -direction when a stopwatch reads \)10.0 \mathrm{s} .$ It has a constant acceleration of \(2.0 \mathrm{m} / \mathrm{s}^{2}\) in the \(+x\) -direction. (a) What change in speed occurs between \(t=10.0 \mathrm{s}\) and \(t=12.0 \mathrm{s} ?(\mathrm{b})\) What is the speed when the stopwatch reads \(12.0 \mathrm{s} ?\)
See all solutions

Recommended explanations on Physics Textbooks

Wave Optics

Read Explanation

Engineering Physics

Read Explanation

Magnetism and Electromagnetic Induction

Read Explanation

Dynamics

Read Explanation

Thermodynamics

Read Explanation

Further Mechanics and Thermal Physics

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.