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PROBLEM 10.36
A load
W
of magnitude 72 lb is applied to the mechanism at C.
Neglecting the weight of the mechanism, determine the value of
corresponding to equilibrium. The constant of the spring is
20 lb/in.,k
and the spring is unstretched when
0.
PROBLEM 10.37
Knowing that the constant of spring CD is k and that the spring is unstretched
when rod ABC is horizontal, determine the value of
corresponding to
equilibrium for the data indicated.
300 N, 400 mm, 5 kN/m.Pl k
PROBLEM 10.37 (Continued)
PROBLEM 10.38
Knowing that the constant of spring CD is k and that the spring is
unstretched when rod ABC is horizontal, determine the value of
corresponding to equilibrium for the data indicated.
75 lb, 15 in., 20 lb/in.Pl k
PROBLEM 10.39
The lever AB is attached to the horizontal shaft BC that passes
through a bearing and is welded to a fixed support at C. The
torsional spring constant of the shaft BC is K; that is, a couple of
magnitude K is required to rotate end B through 1 rad. Knowing
that the shaft is untwisted when AB is horizontal, determine the
value of
corresponding to the position of equilibrium when
100 N, 250 mm,Pl
and
12.5 N · m/rad.K
PROBLEM 10.40
Solve Problem 10.39 assuming that
350 N,P
250 mm,l
and
12.5 N · m/rad.K
Obtain answers in each of the following
quadrants:
0 90 , 270 360°, 360 450 .
PROBLEM 10.39
The lever AB is attached to the horizontal shaft
BC that passes through a bearing and is welded to a fixed support
at C. The torsional spring constant of the shaft BC is K; that is, a
couple of magnitude K is required to rotate end B through 1 rad.
Knowing that the shaft is untwisted when AB is horizontal,
determine the value of
corresponding to the position of
equilibrium when
100P
N, l
250 mm,
and
12.5 N · m/rad.K
PROBLEM 10.40 (Continued)
PROBLEM 10.41
The position of boom ABC is controlled by the hydraulic cylinder
BD. For the loading shown, determine the force exerted by the
hydraulic cylinder on pin B when
= 70.
PROBLEM 10.42
The position of boom ABC is controlled by the hydraulic
cylinder BD. For the loading shown, determine the largest
allowable value of the angle
if the maximum force that
the cylinder can exert on pin B is 25 kips.
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 .
