Answered: a potters wheel of radius 42.73 cm and…

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter8: Rotational Motion

Section: Chapter Questions

Problem 5STP

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Question

a potters wheel of radius 42.73 cm and mass 111 kg is freely rotating at 55 rev/min. The potter can stop the wheel in 6.755s by pressing a wet rag against the rim and exerting a radially inward force of 77.7 N. Part A) What is the angular acceleration of the wheel? Part B) how much torque does the potter apply to the wheel?

Definition Definition Rate of change of angular velocity. Angular acceleration indicates how fast the angular velocity changes over time. It is a vector quantity and has both magnitude and direction. Magnitude is represented by the length of the vector and direction is represented by the right-hand thumb rule. An angular acceleration vector will be always perpendicular to the plane of rotation. Angular acceleration is generally denoted by the Greek letter α and its SI unit is rad/s 2 .

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