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Sears and Zemansky's University Physics with Modern Physics | 13th Edition | ISBN: 9780321696861 | Authors: Hugh D. Young; Roger A. Freedman; A. Lewis Ford
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The horizontal beam in Fig. E11.14 weighs 150 N, and its

Chapter 11, Problem 11.14

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QUESTION:

The horizontal beam in Fig. E11.14 weighs 150 N, and its center of gravity is at its center. Find (a) the tension in the cable and (b) the horizontal and vertical components of the force exerted on the beam at the wall

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QUESTION:

The horizontal beam in Fig. E11.14 weighs 150 N, and its center of gravity is at its center. Find (a) the tension in the cable and (b) the horizontal and vertical components of the force exerted on the beam at the wall

ANSWER:

Step 1 of 3

We have given that the horizontal beam weighs

Its center of gravity is at its center and

So the weight of the beam is perpendicular to the beam and is at distance of  from the axis. The tension in the cable makes an angle of  with the beam, but since the perpendicular force is the force that produces torque on the beam, then tension that produces torque on the beams is  and it is at distance of  for the axis.

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