ound around the rim of a uniform disc that is pivoted to rotate without friction about a fixed axis through if center. The mass of the disk is 5 kg with a radius of 45 cm the string I’d pulled with 15 n of force . What is it’s angul

ound around the rim of a uniform disc that is pivoted to rotate without friction about a fixed axis through if center. The mass of the disk is 5 kg with a radius of 45 cm the string I’d pulled with 15 n of force . What is it’s angul

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter11: Angular Momentum

Section: Chapter Questions

Problem 63P: Three children are riding on the edge of a merry-go-round that is 100 kg, has a 1.60-m radius, and...

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Concept explainers

Angular speed, acceleration and displacement

Angular acceleration is defined as the rate of change in angular velocity with respect to time. It has both magnitude and direction. So, it is a vector quantity.

Angular Position

Before diving into angular position, one should understand the basics of position and its importance along with usage in day-to-day life. When one talks of position, it’s always relative with respect to some other object. For example, position of earth with respect to sun, position of school with respect to house, etc. Angular position is the rotational analogue of linear position.

Question

A string is wound around the rim of a uniform disc that is pivoted to rotate without friction about a fixed axis through if center. The mass of the disk is 5 kg with a radius of 45 cm the string I’d pulled with 15 n of force . What is it’s angular velocity after 7 seconds

Definition Definition Rate of change of angular displacement. Angular velocity indicates how fast an object is rotating. It is a vector quantity and has both magnitude and direction. The magnitude of angular velocity is represented by the length of the vector and the direction of angular velocity is represented by the right-hand thumb rule. It is generally represented by ω.

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