# Construct Your Own the work done by a spinning skater

## Problem 35PE Chapter 10

Physics: Principles with Applications | 6th Edition

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Physics: Principles with Applications | 6th Edition

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Problem 35PE

Construct Your Own the work done by a spinning skater pulling her arms in to increase her rate of spin. Construct a problem in which you calculate the work done with a “force multiplied by distance” calculation and compare it to the skater’s increase in kinetic energy.

Step-by-Step Solution:

Step-by-step solution Step 1 of 9 A skater of mass 60 kg is spinning in a circle with both arm stretched. In order to increase the angular speed, the skater brings his arm in. The body is considered as a cylinder of radius 0.25 m. Mass of each arm is 2.5 kg. Length of each arm is 0.75 meter. Find the change in rotational kinetic energy of the skater if she brings her arm in. the initial angular speed of the skater is . Step 2 of 9 The moment of inertia of the skater when her arm are stretched is, Here is the mass of skater, is radius, is initial moment of inertia, is the mass of each arm is the radius of each arm. Step 3 of 9 Substitute for , for , for and for . Step 4 of 9 The moment of inertia of the skater when she brings her arm in, Here is the mass of skater, is radius and is final moment of inertia. Step 5 of 9 Substitute for , for .

Step 6 of 9

Step 7 of 9

##### ISBN: 9780130606204

The full step-by-step solution to problem: 35PE from chapter: 10 was answered by Sieva Kozinsky, our top Physics solution expert on 03/03/17, 03:53PM. Since the solution to 35PE from 10 chapter was answered, more than 283 students have viewed the full step-by-step answer. This full solution covers the following key subjects: work, skater, construct, done, increase. This expansive textbook survival guide covers 35 chapters, and 3914 solutions. This textbook survival guide was created for the textbook: Physics: Principles with Applications, edition: 6th. The answer to “Construct Your Own the work done by a spinning skater pulling her arms in to increase her rate of spin. Construct a problem in which you calculate the work done with a “force multiplied by distance” calculation and compare it to the skater’s increase in kinetic energy.” is broken down into a number of easy to follow steps, and 47 words. Physics: Principles with Applications was written by Sieva Kozinsky and is associated to the ISBN: 9780130606204.

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