PROBLEM 2.69
A load Q is applied to the pulley C, which can roll on the
cable ACB. The pulley is held in the position shown by a
second cable CAD, which passes over the pulley A and
supports a load P. Knowing that
750 N,P=
determine
(a) the tension in cable ACB, (b) the magnitude of load Q.
PROBLEM 2.70
An 1800–N load Q is applied to the pulley C, which can roll
on the cable ACB. The pulley is held in the position shown by
a second cable CAD, which passes over the pulley A and
supports a load P. Determine (a) the tension in cable ACB,
(b) the magnitude of load P.
PROBLEM 2.71
Determine (a) the x, y, and z components of the 600–N force,
(b) the angles
θ
x,
θ
y, and
θ
z that the force forms with the
coordinate axes.
PROBLEM 2.72
Determine (a) the x, y, and z components of the 450–N force,
(b) the angles
θ
x,
θ
y, and
θ
z that the force forms with the
coordinate axes.
PROBLEM 2.73
A gun is aimed at a point A located 35° east of north. Knowing that the barrel of the gun forms an angle
of 40° with the horizontal and that the maximum recoil force is 400 N, determine (a) the x, y, and z
components of that force, (b) the values of the angles θx, θy, and θz defining the direction of the recoil
force. (Assume that the x, y, and z axes are directed, respectively, east, up, and south.)
PROBLEM 2.74
PROBLEM 2.73 A gun is aimed at a point A located 35° east of north. Knowing that the barrel of the
gun forms an angle of 40° with the horizontal and that the maximum recoil force is 400 N, determine
(a) the x, y, and z components of that force, (b) the values of the angles θx, θy, and θz defining the direction
of the recoil force. (Assume that the x, y, and z axes are directed, respectively, east, up, and south.)
PROBLEM 2.75
The angle between spring AB and the post DA is 30°. Knowing
that the tension in the spring is 50 lb, determine (a) the x, y,
and z components of the force exerted on the circular plate at
B, (b) the angles
θ
x,
θ
y, and
θ
z defining the direction of the
force at B.
PROBLEM 2.76
The angle between spring AC and the post DA is
30°. Knowing that the tension in the spring is 40 lb,
determine (a) the x, y, and z components of the force
exerted on the circular plate at C, (b) the angles
θ
x,
θ
y, and
θ
z defining the direction of the force at C.
zF
F
z
PROBLEM 2.77
Cable AB is 65 ft long, and the tension in that cable is 3900 lb.
Determine (a) the x, y, and z components of the force exerted by the
cable on the anchor B, (b) the angles
,
x
θ
,
y
θ
and
z
θ
defining the
direction of that force.
PROBLEM 2.78
Cable AC is 70 ft long, and the tension in that cable is 5250 lb.
Determine (a) the x, y, and z components of the force exerted by the
cable on the anchor C, (b) the angles
θ
x,
θ
y, and
θ
z defining the
direction of that force.