A 20.0-m-long uniform beam weighing 700 N rests on walls A and B, as shown in the figure below. с 3.0 m Cyright ©2008 Pearson Education in A -20.0 m 12.0 m B D (a) Find the maximum mass of a person who can walk to the extreme end D without tipping the beam. (Hint: At that moment, the normal force on the beam due to wall A would be zero.) (b) Find the forces that the walls A and B exert on the beam when the person is standing at D. (c) Find the forces that the walls A and B exert on the beam when the person is standing at a point 2.0 m to the right of B. (d) Find the forces that the walls A and B exert on the beam when the person is standing at a point 2.0 m to the right of A.

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Chapter1: Units, Trigonometry. And Vectors
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A 20.0-m-long uniform beam weighing 700 N rests on walls A and B, as shown in the
figure below.
C
-3.0 m-
Copyright ©2008 Pearson Education, Inc.
A
20.0 m
12.0 m
B
D
(a) Find the maximum mass of a person who can walk to the extreme end D without
tipping the beam. (Hint: At that moment, the normal force on the beam due to
wall A would be zero.)
(b) Find the forces that the walls A and B exert on the beam when the person is
standing at D.
(c) Find the forces that the walls A and B exert on the beam when the person is
standing at a point 2.0 m to the right of B.
(d) Find the forces that the walls A and B exert on the beam when the person is
standing at a point 2.0 m to the right of A.
Transcribed Image Text:A 20.0-m-long uniform beam weighing 700 N rests on walls A and B, as shown in the figure below. C -3.0 m- Copyright ©2008 Pearson Education, Inc. A 20.0 m 12.0 m B D (a) Find the maximum mass of a person who can walk to the extreme end D without tipping the beam. (Hint: At that moment, the normal force on the beam due to wall A would be zero.) (b) Find the forces that the walls A and B exert on the beam when the person is standing at D. (c) Find the forces that the walls A and B exert on the beam when the person is standing at a point 2.0 m to the right of B. (d) Find the forces that the walls A and B exert on the beam when the person is standing at a point 2.0 m to the right of A.
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