/*! 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} Q26P The driver of a car traveling at... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 2: Q26P (page 84)

The driver of a car traveling at a speed of 18 m/s slams on the brakes and comes to a stop in 4s . If we assume that the car's speed changed at a constant rate (constant net force): (a) what was the car's average speed during this 4 s interval? (b) How far did the car go in this 4 s interval?

Short Answer

Expert verified

(a) Average speedvavg=9鈥�m/s

(b) Distance traveldt=36m

Step by step solution

01

Identification of given data

  • Initial velocity vi=18m/s
  • Final velocity vf=0
  • Time requiredt=4s
02

Average speed

Average speed is ratio of total distance travelled in a particular period of time.

03

Calculation for the average speed

(a) The average speed of an object is calculated by

vavg=dtt

Here,

dt = Total distance

t = Total time

If the speed changes at a constant rate, the average speed is the initial and final velocity arithmetic mean.

vavg=vi+vf2vavg=18+02vavg=9m/s

Then, The average speed will bevavg=9m/s

04

Calculation for the distance travel

(b) Use the equation refeered to in step 2

vavg=dttdt=vavg脳tdt=9m/s脳4sdt=36m

Hence the total distance traveldt=36m

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 ball moves in the direction of the arrow labeledin Figure. The ball is struck by a stick that briefly exerts a force on the ball in the direction of the arrow labeled. Which arrow best describes the direction of, the change in the ball's momentum?

Question: You observe three carts moving to the left. Cart A moves to the left at nearly constant speed. Cart B moves to the left, gradually speeding up. Cart C moves to the left, gradually slowing down. Which cart or carts, if any, experience a net force to the left?

Consider a silver wire with a cross-sectional area of 1mm2carrying0.3Aof current. The conductivity of silver is6.3脳107(A/m2)(V/m). Calculate the magnitude of the electric field required to drive this current through the wire.

At a certain instant a particle is moving in the +xdirection with momentum+8kg路m/s. During the next 0.13sa constant force acts on the particle, with Fx=-7N and xFy=+5N. What is the magnitude of the momentum of the particle at the end of this v interval?

You hang a 10 kg mass from a copper wire, and the wire stretches by .

(a)If you suspend the same mass from two copper wires, identical to the original wire, what happens?

(b)If you suspend the same mass from a copper wire with half the cross-sectional area but the same length as the original wire, what happens?

(c)If you suspend the same mass from a copper wire with the same cross-sectional area but twice the length of the original wire, what happens?
See all solutions

Recommended explanations on Physics Textbooks

Further Mechanics and Thermal Physics

Read Explanation

Nuclear Physics

Read Explanation

Space Physics

Read Explanation

Physical Quantities And Units

Read Explanation

Work Energy and Power

Read Explanation

Medical 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.