Logout Open In App
Open In App
Warning: foreach() argument must be of type array|object, bool given in /var/www/html/web/app/themes/studypress-core-theme/template-parts/header/mobile-offcanvas.php on line 20

Chapter 11: Q7CQ (page 354)

If the torque acting on a particle about an axis through a certain origin is zero, what can you say about its angular momentum about that axis?

Short Answer

Expert verified

The solution is as follows.

Angular momentum is conserved around that axis. Nothing can be deduced regarding the magnitude of angular momentum around that axis.

Step by step solution

01

Definition of Angular momentum:

Moment of inertia multiplied by the angular velocity, or the object's radius multiplied by the linear momentum. After a collision in a closed system, angular momentum is conserved in all directions.

02

Expression for Angular Momentum

The expression for the angular momentum is given by,

L=mvr

Here, m is the mass, v is the velocity, and r is the radius.

Angular momentum is conserved around that axis. Nothing can be deduced regarding the magnitude of angular momentum around that axis.

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.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

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

VectorA→ is in the negative y direction, and vectorB→ is in the negative x direction.

(i) What is the direction of A→×B→

(a) no direction because it is a scalar

(b) x (c)  -y(d) z (e) -z

(ii) What is the direction ofB→×A→ . Choose from the same possibilities (a)through (e).

Two children are playing with a roll of paper towels.One child holds the roll between the index fingersof her hands so that it is free to rotate, and the second child pulls at constant speed on the free end ofthe paper towels. As the child pulls the paper towels,the radius of the roll of remaining towels decreases.

(a) How does the torque on the roll change with time?(b) How does the angular speed of the roll change in time? (c) If the child suddenly jerks the end paper towel with a large force, is the towel more likely to break from the others when it is being pulled from an early full roll or from a nearly empty roll?

Calculate the net torque (magnitude and direction) on the beam in Figure P11.5 about

(a) an axis through O perpendicular to the page and

(b) an axis through C perpendicular to the page.

If |A→×B→|=A→ · B→what is the angle betweenA→ and B→ ?

Two vectors are given byA→=i^+2j^and B→=-2i^+3j^. Find (a)localid="1668172333096" A→×B→and (b) the angle between localid="1668172350501" A→and localid="1668172423134" B→.
See all solutions

Recommended explanations on Physics Textbooks

Kinematics Physics

Read Explanation

Quantum Physics

Read Explanation

Radiation

Read Explanation

Classical Mechanics

Read Explanation

Circular Motion and Gravitation

Read Explanation

Oscillations

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.

Sign-up for free