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PROBLEM 3.156 (Continued)
Copyright © McGraw-Hill Education. Permission required for reproduction or display.
PROBLEM 3.157
Three horizontal forces are applied as shown to a vertical cast iron
arm. Determine the resultant of the forces and the distance from the
ground to its line of action when (a) P = 200 N, (b) P = 2400 N,
(c) P = 1000 N.
PROBLEM 3.157 (Continued)
Copyright © McGraw-Hill Education. Permission required for reproduction or display.
PROBLEM 3.158
While using a pencil sharpener, a
student applies the forces and couple
shown. (a) Determine the forces
exerted at B and C knowing that these
forces and the couple are equivalent
to a force-couple system at A
consisting of the force
(2.6 lb) + =Ri
(0.7
y
R−j
lb)k and
the couple
R
Ax
M= +Mi
(1.0 lb · ft) −j
(0.72 lb · ft) .k
(b) Find
the corresponding values of
y
R
and
.
x
M
