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PROBLEM 10.20
For the linkage shown, determine the force
Q
required for
equilibrium when
18 in.,l
600 lb in.,M
and
70 .
PROBLEM 10.21
A 4-kN force
P
is applied as shown to the piston of the engine
system. Knowing that
= 50 mmAB
and BC
200 mm,
determine the couple
M
required to maintain the equilibrium
of the system when (a)
30, (b)
150 .
PROBLEM 10.21 (Continued)
PROBLEM 10.22
A couple
M
of magnitude 100 N m is applied as shown to the
crank of the engine system. Knowing that AB
50 mm
and
200 mm,BC
determine the force
P
required to maintain the
equilibrium of the system when (a)
60 ,
(b)
120 .
PROBLEM 10.22 (Continued)
PROBLEM 10.23
Rod AB is attached to a block at A that can slide freely in the vertical
slot shown. Neglecting the effect of friction and the weights of the
rods, determine the value of
corresponding to equilibrium.
400sin
400cos
A
A
y
y
100cos
100sin
D
D
x
x
Virtual Work:
(160 N) (800 N) 0
AD
Uyx
(160)(400 cos ) (800)( 100sin ) 0
sin 0.8; tan 0.8
cos
38.7
PROBLEM 10.24
Solve Problem 10.23 assuming that the 800-N force is replaced by a
24-N m
clockwise couple applied at D.
PROBLEM 10.23
Rod AB is attached to a block at A that can slide
freely in the vertical slot shown. Neglecting the effect of friction and
the weights of the rods, determine the value of
corresponding to
equilibrium.
PROBLEM 10.25
Determine the value of
corresponding to the equilibrium position of the rod
of Problem 10.10 when
30 in.,l
5 in.,a
25 lb,P
and
40 lb.Q
PROBLEM 10.10
The slender rod AB is attached to a collar A and rests on a
small wheel at C. Neglecting the radius of the wheel and the effect of friction,
derive an expression for the magnitude of the force
Q
required to maintain the
equilibrium of the rod.
PROBLEM 10.25 (Continued)
PROBLEM 10.26
Determine the values of
corresponding to the equilibrium position of the rod
of Prob. 10.11 when l = 24 in., a = 4 in., P = 10 lb, and Q = 18 lb.
PROBLEM 10.11
The slender rod AB is attached to a collar A and rests on a
small wheel at C. Neglecting the radius of the wheel and the effect of friction,
derive an expression for the magnitude of the force
Q
required to maintain the
equilibrium of the rod.
