MEM202 – Engineering Mechanics: Statics
Quiz #2
October 4, 2007
Name: __________________________________
Section: ____________________
A. Multiple Choice.
Circle ONE answer that best answers the question. [10 points]
1. If you know just
A
u
s
, you can determine the ______ of
A
s
uniquely.
a) magnitude of
A
s
b) coordinate angles (
α
,
β
and
γ
)
c) components (A
x
, A
y
and A
z
)
d) all of the above
answer: b)
2. A position vector,
PQ
r
s
, is obtained by
a) coordinates of Q minus coordinates of P
b) coordinates of P minus coordinates of Q
c) coordinates of A minus coordinates of the origin d) coordinates of the origin minus coordinates of P
3. A force of magnitude F, directed along a unit vector,
u
s
, is give by
F
s
= ________.
a)
u
F
s
b)
F
u
s
c)
u
F
s
d)
u
F
s
s
+
answer: a)
4. Two points in 3D space have coordinates of P (1,2,3) and Q (4,5,6) meters.

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