Answered: For the given figure, the weight of the…

For the given figure, the weight of the 12-ft bar is 5 lb. The moment of the tension in the cord about the fulcrum (point O) is:

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter10: Fixed-axis Rotation

Section: Chapter Questions

Problem 2CQ: What is the value of the angular acceleration of the second hand of the clock on the wall?

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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

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For the given figure, the weight of the 12-ft bar is 5 lb. The moment of the tension in the cord about the fulcrum (point O) is:
4'
48 Ib-ft, counterclockwise
48 Ib-ft, clockwise

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