Answered: A circular disk has a rotational…

A circular disk has a rotational inertia of 8.6 kg.m² and a constant angular acceleration of 9.8 rad/s. If it starts from rest the work done during the first 4.2s by the net torque acting on it is:

University Physics Volume 1

18th Edition

ISBN:9781938168277

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

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

Chapter10: Fixed-axis Rotation

Section: Chapter Questions

Problem 56P: Calculate the rotational kinetic energy of a 12-kg motorcycle wheel if its angular velocity is 120...

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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 circular disk has a rotational inertia of 8.6 kg.m² and a constant angular acceleration
of 9.8 rad/s. If it starts from rest the work done during the first 4.2s by the net torque
acting on it is:

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