#20 20. A washing machine spin dries clothes. It starts spinning at 20 rad/s and slows down to 8 rad/s whileturning through 500 revolutions.a. What is the angular acceleration?b. How much time does it take to slow down?a. 8²=20² +2α (1000)64=400+2000x= -0535 rad/₁2b.21. A gyroscope rotates through and angle of 200 radians while accelerating from rest at 2.5 rad/s².a. How long does it take to reach 200 radians?b. What is it final angular velocity?C. What is the linear velocity at its edge (R = 0.05 m)?22. A breeze causes a pinwheel (starting from rest). To accelerate at 0.4 rad/s² for 9 seconds.How many radians does it turn through?a.b. How many revolutions will it make?

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Answered: 20. A washing machine spin dries…

20. A washing machine spin dries clothes. It starts spinning at 20 rad/s and slows turning through 500 revolutions. a. What is the angular acceleration? b. How much time does it take to slow down?

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

#20

20. A washing machine spin dries clothes. It starts spinning at 20 rad/s and slows down to 8 rad/s while
turning through 500 revolutions.
a. What is the angular acceleration?
b. How much time does it take to slow down?
a. 8²=20² +2α (1000)
64=400+2000
x= -0535 rad/₁2
b.
21. A gyroscope rotates through and angle of 200 radians while accelerating from rest at 2.5 rad/s².
a. How long does it take to reach 200 radians?
b. What is it final angular velocity?
C. What is the linear velocity at its edge (R = 0.05 m)?
22. A breeze causes a pinwheel (starting from rest). To accelerate at 0.4 rad/s² for 9 seconds.
How many radians does it turn through?
a.
b. How many revolutions will it make?

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