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PROBLEM 4.60
The bracket ABC can be supported in the eight different ways shown. All connections consist of smooth
pins, rollers, or short links. For each case, answer the questions listed in Problem 4.59, and, wherever
possible, compute the reactions, assuming that the magnitude of the force
P
is 100 lb.
PROBLEM 4.60 (Continued)
PROBLEM 4.61
A 500-lb cylindrical tank, 8 ft in diameter, is to be raised over a 2-ft
obstruction. A cable is wrapped around the tank and pulled
horizontally as shown. Knowing that the corner of the obstruction at A
is rough, find the required tension in the cable and the reaction at A.
Copyright © McGraw-Hill Education. Permission required for reproduction or display.
PROBLEM 4.62
Determine the reactions at A and B when
180 mm.a
:BCD
240
tan 180
53.13
Force triangle
(300 N) tan53.13
400 N
A
400 NA
300 N
cos 53.13°
500 N
B
500 NB53.1
PROBLEM 4.63
For the bracket and loading shown, determine the range of values
of the distance a for which the magnitude of the reaction at B does
not exceed 600 N.
240 mm
tan
a
(1)
Force Triangle
(with 600 N)B
300 N
cos 0.5
600 N
60.0
Eq. (1)
240 mm
tan 60.0°
138.56 mm
a
For
600 NB
138.6 mma
PROBLEM 4.64
The spanner shown is used to rotate a shaft. A pin fits in a
hole at A, while a flat, frictionless surface rests against the
shaft at B. If a 60-lb force
P
is exerted on the spanner at D,
find the reactions at A and B.
PROBLEM 4.65
Determine the reactions at B and C when a = 30 mm.
PROBLEM 4.66
A 12-ft wooden beam weighing 80 lb is supported by a pin and
bracket at A and by cable BC. Find the reaction at A and the tension
in the cable.
Copyright © McGraw-Hill Education. Permission required for reproduction or display.
PROBLEM 4.67
Determine the reactions at B and D when
60 mm.b
Copyright © McGraw-Hill Education. Permission required for reproduction or display.
PROBLEM 4.68
For the frame and loading shown, determine the reactions at C and D.
