978-0073398242 Chapter 10 Solution Manual Part 7

subject Type Homework Help
subject Pages 9
subject Words 1233
subject Authors Brian Self, David Mazurek, E. Johnston, Ferdinand Beer, Phillip Cornwell

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PROBLEM 10.52
Knowing that the coefficient of static friction between the block attached to
rod ACE and the horizontal surface is 0.15, determine the magnitude of the
largest and smallest force Q for which equilibrium is maintained when
30 , 0.2 m,l
 and P 40 N.
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PROBLEM 10.53
Using the method of virtual work, determine separately the
force and couple representing the reaction at A.
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PROBLEM 10.53 (Continued)
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PROBLEM 10.54
Using the method of virtual work, determine the reaction at D.
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PROBLEM 10.55
Referring to Problem 10.43 and using the value
found for the force exerted by the hydraulic cylinder
CD, determine the change in the length of CD
required to raise the 10-kN load by 15 mm.
PROBLEM 10.43
The position of member ABC is
controlled by the hydraulic cylinder CD. For the
loading shown, determine the force exerted by the
hydraulic cylinder on pin C when
55 .

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PROBLEM 10.56
Referring to Problem 10.45 and using the value found for the
force exerted by the hydraulic cylinder BD, determine the
change in the length of BD required to raise the platform
attached at C by 2.5 in.
PROBLEM 10.45
The telescoping arm ABC is used to
provide an elevated platform for construction workers. The
workers and the platform together weigh 500 lb and their
combined center of gravity is located directly above C. For
the position when
20 ,
determine the force exerted on
pin B by the single hydraulic cylinder BD.
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PROBLEM 10.57
Determine the vertical movement of joint D if the length of
member BF is increased by 1.5 in. (Hint: Apply a vertical
load at joint D, and, using the methods of Chapter 6,
compute the force exerted by member BF on joints B and
F. Then apply the method of virtual work for a virtual
displacement resulting in the specified increase in length of
member BF. This method should be used only for small
changes in the lengths of members.)
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PROBLEM 10.58
Determine the horizontal movement of joint D if the length
of member BF is increased by 1.5 in. (See the hint for
Problem 10.57.)
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PROBLEM 10.59
Using the method of Section 10.8, solve Problem 10.29.
PROBLEM 10.29
Two rods AC and CE are connected by a pin
at C and by a spring AE. The constant of the spring is k, and the
spring is unstretched when
30 .
For the loading shown,
derive an equation in P,
, l, and k that must be satisfied when
the system is in equilibrium.
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PROBLEM 10.60
Using the method of Section 10.8, solve Problem 10.30.
PROBLEM 10.30 Two rods AC and CE are connected by a pin
at C and by a spring AE. The constant of the spring is 1.5 lb/in.,
and the spring is unstretched when 30 .

Knowing that
10 in.l
and neglecting the weight of the rods, determine the
value of
corresponding to equilibrium when 40 lb.P

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