/*! 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} Q2. What must your car鈥檚 average s... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 2: Q2. (page 43)

What must your car鈥檚 average speed be in order to travel 235 km in 2.75 h?

Short Answer

Expert verified

The average speed of the car must be 85.45kmh.

Step by step solution

01

Step 1. Relation between the average speed with distance and time

The term 鈥榮peed鈥� can be defined as the rate of change of the position of an object with respect to time. The speed of an object is calculated by dividing the distance covered by an object by the time taken to cover that distance.

Given data.

The traveled distance is 螖x=235km.

The time for the trip is localid="1642740006851" 螖t=2.75h.

Rule.

The average speed, localid="1642739823981" v=螖x螖t.

02

Step 2. Finding the value of the average speed

Now, the average speed is

v=235km2.75h=85.45kmh

Therefore, the average speed of the car must be 85.45kmh.

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 is dropped from the top of a tall building. At the same instant, a second ball is thrown upward from the ground level. When the two balls pass one another, one on the way up, the other on the way down, compare the magnitudes

of their acceleration:

(a) The acceleration of the dropped ball is greater.

(b) The acceleration of the ball thrown upward is greater.

(c) The acceleration of both balls is the same.

(d) The acceleration changes during the motion, so you cannot predict the exact value when the two balls pass each other.

(e) The accelerations are in opposite directions.

When an object moves with constant velocity, does its average velocity during any time interval differ from its instantaneous velocity at any instant? Explain.

As a freely falling object speeds up, what is happening to its acceleration 鈥揹oes it increase, decrease, or stay the same? (a) Ignore air resistance. (b) Consider air resistance.

A car moving in a straight line starts atx鈥�=鈥�0att鈥�=鈥�0. It passes the pointx鈥�=鈥�25.0鈥�mwith a speed of 11.0 m/s att鈥�=鈥�3.0鈥�s. It passes the pointx鈥�=鈥�385鈥�mwith a speed of 45.0 m/s att鈥�=鈥�20.0鈥�s. Find (a) the average velocity and (b) the average acceleration, betweent鈥�=鈥�3.0鈥�sandt鈥�=鈥�20.0鈥�s.

Consider the street pattern shown in Fig. 2鈥�46. Each inter-section has a traffic signal, and the speed limit is 40 km/h. Suppose you are driving from the west at the speed limit. When you are 10.0 m from the first intersection, all the lights turn green. The lights are green for 13.0 s each. (a) Calculate the time needed to reach the third stoplight. Can you make it through all three lights without stopping? (b) Another car was stopped at the first light when all the lights turned green. It can accelerate at the rate of2.00m/s2to the speed limit. Can the second car make it through all three lights without stopping? By how many seconds would it make it, or not make it?

FIGURE 2-46Problem 65
See all solutions

Recommended explanations on Physics Textbooks

Work Energy and Power

Read Explanation

Famous Physicists

Read Explanation

Atoms and Radioactivity

Read Explanation

Electricity

Read Explanation

Electric Charge Field and Potential

Read Explanation

Fields in 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.