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# Integrated Concepts You have a grindstone (a disk) that is

ISBN: 9780130606204 3

## Solution for problem 3PE Chapter 10

Physics: Principles with Applications | 6th Edition

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Problem 3PE

Integrated Concepts You have a grindstone (a disk) that is 90.0 kg, has a 0.340-m radius, and is turning at 90.0 rpm, and you press a steel axe against it with a radial force of 20.0 N. (a) Assuming the kinetic coefficient of friction between steel and stone is 0.20, calculate the angular acceleration of the grindstone. (b) How many turns will the stone make before coming to rest?

Step-by-Step Solution:

Step-by-step solution Step 1 o f 13 The force of kinetic friction acting on the surface is, Where is the friction force, is the coefficient of friction and is the normal force due to the axe on the grinder. Step 2 o f 13 (a) Use the above formula, Step 3 o f 13 Substitute 0.20 for and for . Step 4 o f 13 This frictional force is reducing the speed of the grindstone, so the angular acceleration will be negative. As the radius of the grindstone is 0.340-m, so the torque due to this frictional force about the axis is Here is the torque, is the radius of the grindstone, is the frictional force acting on the surface. Step 5 o f 13 Substitute the values of for and for in the above equation. Step 6 o f 13 Also, the formula to find the torque acting on the grindstone is, Here is the moment of inertia of the grindstone, is the angular acceleration the grindstone around its axis of rotation. Step 7 o f 13 The moment of inertia of the grindstone (disk) is, Here is the mass of the grindstone and is the radius.

Step 8 of 13

Step 9 of 13

##### ISBN: 9780130606204

The answer to “Integrated Concepts You have a grindstone (a disk) that is 90.0 kg, has a 0.340-m radius, and is turning at 90.0 rpm, and you press a steel axe against it with a radial force of 20.0 N. (a) Assuming the kinetic coefficient of friction between steel and stone is 0.20, calculate the angular acceleration of the grindstone. (b) How many turns will the stone make before coming to rest?” is broken down into a number of easy to follow steps, and 69 words. The full step-by-step solution to problem: 3PE from chapter: 10 was answered by , our top Physics solution expert on 03/03/17, 03:53PM. Since the solution to 3PE from 10 chapter was answered, more than 304 students have viewed the full step-by-step answer. This textbook survival guide was created for the textbook: Physics: Principles with Applications, edition: 6. This full solution covers the following key subjects: grindstone, stone, steel, acceleration, AXE. This expansive textbook survival guide covers 35 chapters, and 3914 solutions. Physics: Principles with Applications was written by and is associated to the ISBN: 9780130606204.

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Integrated Concepts You have a grindstone (a disk) that is

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