Problem 3-6 (page 84)

1
Problem 3-6 (page 84)
A force of 30 lb is applied to the handle of the
wrench. Determine the moment of this force about
point 0.
Solution
2
Problem 3-17 (page 86)
Determine the moment of the force F at point A
about point P. Express the result as a Cartesian
vector.
Solution
3
Problem 3-17 continued
4
Problem 3-22 (page 87)
Using Cartesian vectors, determine the moment of
each of the two forces acting on the pipe
assembly about point A. Add these moments and
calculate the magnitude and coordinate direction
angles of the resultant moment.
Solution
5
Problem 3-22 continued
6
Problem 3-22 continued
7
Problem 3-38 (page 95)
Determine the moment that the force F exerts
about the y axis of the shaft. Solve the problem
using a Cartesian vector approach and using a
scalar approach. Express the result as a
Cartesian vector.
Solution
8
Problem 3-38 continued
9
Problem 3-38 continued
10
Problem 3-50 (page 103)
The cord passing over the two small pegs A and b
of the board is subjected to a tension of 10 lb.
Determine the minimum tension P and the
orientation ? of the cord passing over the pegs C
and D, so that the resultant couple moment
produced by the two cords is 20 lbin.,
clockwise.
Solution
11
Problem 3-56 (page 103)
Determine the couple moment. Express the result
as a Cartesian Vector.
Solution
12
Problem 3-56 continued
13
Problem 3-65 (page 118)
Replace the force and couple moment system by a
equivalent force and couple moment acting at
point P.
Solution
14
Problem 3-65 continued
15
Problem 3-82 (page 121)
The frame is subjected to the coplanar system of
loads. Replace this system by an equivalent
resultant force and couple moment acting at point
B.
Solution
16
Problem 3-82 continued
17
Problem 2-100 (page 124)
The main beam along the wing of an airplane is
swept back at a angle of 26deg. From load
calculations it is determined that the beam is
subjected to couple moment Mx17 kipft and My25
kipft. Determine the resultant couple moments
created about the x and y axes. The axes all
like in the same horizontal plane.
Solution