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NAME______________________________
RECITATION SECTION_________
MEM202 Engineering Mechanics – Statics
Summer 2007
FINAL EXAM
(Closed Book, Closed Notes, Show All Work, 6 Problems)
Basic Formulas:
2
2
2
(Law of sines)
sin
sin
sin
c
2
cos (Law of cosines)
α
β
γ
=
=
=
+

a
b
c
a
b
ab
1
1
1
2
2
2
For vector
:
cos
,
cos
,
cos
,
cos
cos
cos
1 (Relation between direction cosines)
cos (Dot product)
θ
=
=
=
+
+
=
•
=
A
A B
y
x
z
A
A
A
A
A
A
AB
c
a
b
α
β
γ
NAME______________________________
RECITATION SECTION_________
Problem 1
An exerciser begins with his arm in the relaxed vertical position
OA
, at which the elastic
band is unstretched. He then rotates his arm to the horizontal position
OB
. The elastic
modulus of the band is
k
=60N/m. Determine the
(a) (5pts)
the magnitude of the force
which the band exerts on the hand
B
and
(b) (10pts)
the moment of this force about
O
.
NAME______________________________
RECITATION SECTION_________
Problem
2
A vertical load
P
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