Problem 4: To get it spinning, you exert a force of 180 N perpendicular to the radius of a 0.28 m radius grindstone (a solid disk) of mass 75 kg. a) What is the magnitude of the torque exerted? b) What is the angular acceleration assuming negligible friction in the grindstone's axel?

Problem 4: To get it spinning, you exert a force of 180 N perpendicular to the radius of a 0.28 m radius grindstone (a solid disk) of mass 75 kg. a) What is the magnitude of the torque exerted? b) What is the angular acceleration assuming negligible friction in the grindstone's axel?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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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

Problem 4: To get it spinning, you exert a force of 180 N perpendicular to the radius of a
0.28 m radius grindstone (a solid disk) of mass 75 kg. a) What is the magnitude of the
torque exerted? b) What is the angular acceleration assuming negligible friction in the
grindstone's axel?

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