7. A rotating wheel ring has a mass density of 7850kg/m^3. At what angular velocity will the stress reach 200MN/m² if the mean radius is 250mm? A. 230.47 rad/min C. 638.47 rad/min D. 790 rad/day B. 850.5 rad/hr

7. A rotating wheel ring has a mass density of 7850kg/m^3. At what angular velocity will the stress reach 200MN/m² if the mean radius is 250mm? A. 230.47 rad/min C. 638.47 rad/min D. 790 rad/day B. 850.5 rad/hr

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter6: Uniform Circular Motion And Gravitation

Section: Chapter Questions

Problem 7PE: A truck with 0.420-m-radius tires travels at 32.0 m/s. What is the angular velocity of the rotating...

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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

7. A rotating wheel ring has a mass density of 7850kg/m^3. At what angular velocity will the
stress reach 200MN/m² if the mean radius is 250mm?
C. 638.47 rad/min
D. 790 rad/day
A. 230.47 rad/min
B. 850.5 rad/hr

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