READING QUIZ
The moment of a force about a point or an axis
provides a measure of the force’s tendency ___
A)
to move a body towards the point or axis.
B)
to rotate a body about the point or axis.
C)
to deform a body.
D)
to lift a body.
READING QUIZ
Select the magnitude of the cross product of two vectors A and
B that have an inside angle  between them.
A)
AB sin 
B)
A sin 
B
C)
AB cos 
D)
A2 + B2 – 2AB cos 
READING QUIZ
Find the moment of force F with respect to point C.
A)
0
B)
30 inlb
C)
40 inlb
D)
50 inlb
A
4”
B
5”
3”
F = 10 lb
C
CONCEPT QUIZ
The moment of vector of force F with respect to point A can be
written as
Z
A) {200 i + 300 j } ft-lb
B) {– 200 i + 300 j }ft-lb
A
Y
C) {– 200 i – 300 j }ft-lb
D) {200 i – 300 j }ft-lb
2’
3’
X
F = – 100 k lb
CONCEPT QUIZ
The moment vector of force F with respect to point A lies in the
Z
A) x-z plane.
B) x-y plane.
A
Y
C) y-z plane.
D) Cannot be determined.
2’
3’
X
F = – 100 k lb
ATTENTION QUIZ
Select the true statement.
A)
i  i = 1
B)
i  j = -k
C)
k  j = –i
D)
k  i = –j
ATTENTION QUIZ
Using the figure, find the moment of force F with respect to point A .
A)
0
B)
30 inlb
C)
40 inlb
D)
50 inlb
A
4”
B
5”
3”
F = 10 lb
C