PROBLEM 2.117
For the cable system of Problems 2.107 and 2.108,
determine the tension in each cable knowing that
2880 NP=
and
576 N.Q=
PROBLEM 2.118
For the cable system of Problems 2.107 and 2.108,
determine the tension in each cable knowing that
2880 NP=
and
576Q= −
N. (Q is directed downward).
PROBLEM 2.119
For the transmission tower of Probs. 2.111 and 2.112,
determine the tension in each guy wire knowing that the
tower exerts on the pin at A an upward vertical force of
1800 lb.
PROBLEM 2.111 A transmission tower is held by three
guy wires attached to a pin at A and anchored by bolts at
B, C, and D. If the tension in wire AB is 840 lb, determine
the vertical force P exerted by the tower on the pin at A.
PROBLEM 2.120
Three wires are connected at point D, which is
located 18 in. below the T–shaped pipe support
ABC. Determine the tension in each wire when
a 180–lb cylinder is suspended from point D as
shown.
PROBLEM 2.120 (Continued)
DA
PROBLEM 2.121
A container of weight W is suspended from ring
A, to which cables AC and AE are attached. A
force P is applied to the end F of a third cable
that passes over a pulley at B and through ring A
and that is attached to a support at D. Knowing
that
1000 N,W=
determine the magnitude of P.
(Hint: The tension is the same in all portions of
cable FBAD.)
PROBLEM 2.121 (Continued)
PROBLEM 2.122
Knowing that the tension in cable AC of the
system described in Problem 2.121 is 150 N,
determine (a) the magnitude of the force P, (b)
the weight W of the container.
PROBLEM 2.121 A container of weight W is
suspended from ring A, to which cables AC and
AE are attached. A force P is applied to the end F
of a third cable that passes over a pulley at B and
through ring A and that is attached to a support at
D. Knowing that
1000 N,W=
determine the
magnitude of P. (Hint: The tension is the same in
all portions of cable FBAD.)
PROBLEM 2.123
Cable BAC passes through a frictionless ring A and is
attached to fixed supports at B and C, while cables AD and
AE are both tied to the ring and are attached, respectively, to
supports at D and E. Knowing that a 200–lb vertical load P is
applied to ring A, determine the tension in each of the three
cables.
PROBLEM 2.123 (Continued)
Substituting into
0,
A
Σ=
F
setting
( 200 lb) ,= −Pj
and setting the coefficients of i, j, k equal to
,
φ
we
obtain the following three equilibrium equations:
17.5 4