/*! 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} Q. 50 Two cars are driving at the same... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 2: Q. 50 (page 62)

Two cars are driving at the same constant speed on a

straight road, with car 1 in front of car 2. Car 1 suddenly starts

to brake with constant acceleration and stops in 10 m. At the

instant car 1 comes to a stop, car 2 begins to brake with the

same acceleration. It comes to a halt just as it reaches the back of car 1. What was the separation between the cars before they starting braking?

Short Answer

Expert verified

The separation between the two cars before they starting braking is20m.

Step by step solution

01

Introduction

If we consider that the car 1 is 'd' distance ahead of the car 2.

Distance travelled by the car 1 before stop is equal to s=10m.

02

Calculation of initial speed

Final velocity of car 1 is, v=0

Both the cars have an initial speed ofu.

We can find the initial speed of the car 1 as, localid="1648229426605" 0=u2-2as

Therefore,

localid="1649233598509" role="math" u2=2asu2=2a脳10mu2=20ma...i

03

Calculation of distance

Now, the distance travelled by the car 2 in time t,

localid="1648230229587" d=utd=u脳uaast=uad=u2a...ii

Combining iandii,

localid="1648230309339" d=20maad=20m

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

FIGURE Q2.4 shows a position-versus-time graph for the motion of

objects A and B as they move along the same axis.

a. At the instant t = 1 s, is the speed of A greater than, less than,

or equal to the speed of B? Explain.

b. Do objects A and B ever have the same speed? If so, at what

time or times? Explain.

FIGURE EX2.12 shows the velocity-versus-time graph for a particle moving along the x-axis. Its initial position is x0 = 2.0 m at t0 = 0 s. a. What are the particle鈥檚 position, velocity, and acceleration at t = 1.0 s? b. What are the particle鈥檚 position, velocity, and acceleration at t = 3.0 s?

When a 1984 Alfa Romeo Spider sports car accelerates at the maximum possible rate, its motion during the first 20 s is extremely well modeled by the simple equation
vx2=2Pmt
where P = 3.6 * 104 watts is the car鈥檚 power output, m = 1200 kg is its mass andvx is in m/s. That is, the square of the car鈥檚 velocity increases linearly with time.
a. Find an algebraic expression in terms of P, m, and t for the car鈥檚 acceleration at time t.
b. What is the car鈥檚 speed at t = 2 s and t = 10 s?
c. Evaluate the acceleration at t = 2 s and t = 10 s

A lead ball is dropped into a lake from a diving board 5.0 m

above the water. After entering the water, it sinks to the bottom with a constant velocity equal to the velocity with which it hit the water. The ball reaches the bottom 3.0 s after it is released. How deep is the lake?

A cat is sleeping on the floor in the middle of a 3.0-m-wide room when a barking dog enters with a speed of 1.50 m/s. As the dog enters, the cat (as only cats can do) immediately accelerates at 0.85 m/s2 toward an open window on the opposite side of the room. The dog (all bark and no bite) is a bit startled by the cat and begins to slow down at 0.10 m/s2 as soon as it enters the room. How far is the cat in front of the dog as it leaps through the window?
See all solutions

Recommended explanations on Physics Textbooks

Wave Optics

Read Explanation

Nuclear Physics

Read Explanation

Waves Physics

Read Explanation

Physics of Motion

Read Explanation

Magnetism

Read Explanation

Geometrical and Physical Optics

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.