/*! 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} 9.Q. 10 A sprinter accelerates from rest... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 9: 9.Q. 10 (page 227)

A sprinter accelerates from rest. Is the work done on the sprinter positive, negative, or zero? Explain

Short Answer

Expert verified

Work done on sprinter is negative

Step by step solution

01

Given information

A sprinter accelerates from rest.

02

Explanation

When sprinter accelerates, the work done on sprinters is due to normal reaction on sprinter.

As the sprinter takes off from ground, work done is calculated by the frictional force acting on when sprinter takes off foot from ground.

So ,the normal reaction on the sprinter is negative giving negative work done on the sprinter.

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 5.0kg mass hanging from a spring scale is slowly lowered onto a vertical spring, as shown in the FIGURE. The scale reads in newtons.

a. What does the spring scale read just before the mass touches the lower spring?

b. The scale reads 20N when the lower spring has been compressed by 2.0cm. What is the value of the spring constant for the lower spring?

c. At what compression will the scale read zero?

FIGURE is the force-versus-position graph for a particle moving along the x-axis. Determine the work done on the particle during each of the three intervals 0鈥�1m, 1鈥�2m, and 2鈥�3m.

Two identical horizontal springs are attached to opposite sides of a box that sits on a frictionless table. The outer ends of the springs are clamped while the springs are at their equilibrium lengths. Then a 2.0N force applied to the box, parallel to the springs, compresses one spring by 3.0cm while stretching the other by the same amount. What is the spring constant of the springs?

A 12kgweather rocket generates a thrust of 200N.The rocket, pointing upward, is clamped to the top of a vertical spring. The bottom of the spring, whose spring constant is 550N/m, is anchored to the ground.

a. Initially, before the engine is ignited, the rocket sits at rest on top of the spring. How much is the spring compressed?

b. After the engine is ignited, what is the rocket鈥檚 speed when the spring has stretched 40cm?

A particle of mass m moving along the x-axis has velocity vx=v0sin(蟺虫/2L). How much work is done on the particle as it moves (a) from x=0to x=Land

(b) from x=0tox=2L?
See all solutions

Recommended explanations on Physics Textbooks

Fundamentals of Physics

Read Explanation

Oscillations

Read Explanation

Translational Dynamics

Read Explanation

Electricity and Magnetism

Read Explanation

Torque and Rotational Motion

Read Explanation

Mechanics and Materials

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.