Answered: A potter's wheel is a thick stone of…

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter10: Rotational Motion

Section: Chapter Questions

Problem 3P

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A potter's wheel is a thick stone of radius 0.5 m with mass 100kg. It freely rotates at 50 rpm (revolutions per minutes). Angular speed = 5.24 rad/sec. Kinetic energy of the wheel = 170.95

The potter press a wet rag against the rim and exert a radially inward force of 70 N. This can stop the wheel from spinning in 6 second.

1) Find the angular acceleration of the wheel when it is slowing down

2) Find the magnitude of the torque that stops the wheel

3) Find the friction created by the wet rag on the wheel.

4) Find the coefficient of kinetic friction between the wheel and the rag.

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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