978-0073398242 Chapter 3 Solution Manual Part 4

subject Type Homework Help
subject Pages 9
subject Words 983
subject Authors Brian Self, David Mazurek, E. Johnston, Ferdinand Beer, Phillip Cornwell

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PROBLEM 3.29
In Prob. 3.24, determine the perpendicular distance from point
B to wire AE.
PROBLEM 3.24 The wire AE is stretched between the
corners A and E of a bent plate. Knowing that the tension in
the wire is 435 N, determine the moment about O of the force
exerted by the wire (a) on corner A, (b) on corner E.
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PROBLEM 3.30
In Prob. 3.25, determine the perpendicular distance from point A to a line drawn through points B and C.
PROBLEM 3.25 A 6-ft-long fishing rod AB is securely anchored in the sand of a beach. After a fish
takes the bait, the resulting force in the line is 6 lb. Determine the moment about A of the force exerted by
the line at B.
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PROBLEM 3.31
In Prob. 3.25, determine the perpendicular distance from point D to a line drawn through points B and C.
PROBLEM 3.25 A 6-ft-long fishing rod AB is securely anchored in the sand of a beach. After a fish
takes the bait, the resulting force in the line is 6 lb. Determine the moment about A of the force exerted by
the line at B.
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PROBLEM 3.32
In Prob. 3.26, determine the perpendicular distance from point
O to cable BD.
PROBLEM 3.26 A precast concrete wall section is
temporarily held by two cables as shown. Knowing that the
tension in cable BD is 900 N, determine the moment about
Point O of the force exerted by the cable at B.
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PROBLEM 3.33
In Prob. 3.26, determine the perpendicular distance from point C
to cable BD.
PROBLEM 3.26 A precast concrete wall section is
temporarily held by two cables as shown. Knowing that the
tension in cable BD is 900 N, determine the moment about
Point O of the force exerted by the cable at B.
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PROBLEM 3.34
Determine the value of a that minimizes the
perpendicular distance from Point C to a
section of pipeline that passes through Points
A and B.
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PROBLEM 3.35
Given the vectors P = 2i + 3j k, Q = 5i 4j + 3k, and S = –3i + 2j 5k, compute the scalar products
P · Q, P · S, and Q · S.
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PROBLEM 3.36
Form the scalar product B · C and use the result obtained to prove the
identity
cos (α β) = cos α cos β + sin α sin β .
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PROBLEM 3.37
Three cables are used to support a container as shown.
Determine the angle formed by cables AB and AD.
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PROBLEM 3.38
Three cables are used to support a container as shown.
Determine the angle formed by cables AC and AD.

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