College Physics
OER 2016 Edition
ISBN: 9781947172173
Author: OpenStax
Publisher: OpenStax College
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Chapter 9, Problem 5PE
Repeat the seesaw problem in Example 9.1 with the center of mass of the seesaw 0.160 m to the left of the pivot (on the side of the lighter child) and assuming a mass of 12.0 kg for the seesaw. The other data given in the example remain unchanged. Explicitly show how you follow the steps in the Problem-Solving Strategy for static equilibrium.
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A uniform beam of weight 12 N and length 10 m is mounted by a small hinge on a wall. The beam is held in a horizontal position by a vertical rope at the location as
shown. What is the magnitude of the tension force in the rope, in Newtons?
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6.0 m
Modelled after problem 5 in the Problems_Torque_Statics: A 12.83-m-high and 19.48-m-long wall under construction and its bracing are shown in the figure. The wall is in stable equilibrium without the bracing but can pivot at its base. Calculate the force exerted by each of the 10 braces if a strong wind exerts a horizontal force of 871.28 N on each square meter of the wall. Assume that the net force from the wind acts at a height halfway up the wall and that all braces exert equal forces parallel to their lengths. Neglect the thickness of the wall. The angle between the braces and the wall is as shown in the figure as 35 degrees.
Two children of mass 21 kg and 26 kg sit balanced on a seesaw with the
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College Physics
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