THE LINIVERSITY OF BRITISH COLUMBIA
2OO7
I2OO8 WINTER SESSION
PHYSICS 170 MECHANICS I
Midterm Examination: 7:30 pm to 8:30 pm, Monday, March 3,2008
Write all work to be marked
in the Answer Booklets provided.
You may consult one 8 Yz
inch by I I inch handwritten doublesided
information sheet.
You must hand
in your information sheet with your Answer Booklet in order for your exam to be marked.
You may use a graphing calculator.
The exam consists of 2 questions.
Question
1 is worth l5 marksand
Question
2 is worth 25 marks.
The exam counts for a total of 20 marks towards
your
Final Gradefor the course.
OUESTION I
The diagram below shows arigid body ABCD.
A couplemoment M:10
kkN
m acts at A, aforce
F s : 2 i k N a c t s a t B , a f o r c e F 6 : 3 j k N a c t s a t C a n d a f o r c e F p : 4 k k N a c t s a t D , w h e r e i , j , k a r e t h e u s u a l
Cartesian
unit vectors.
a)
Draw a large, clear diagram
for ABCD showing
the Cartesian
unit vectors and the numerical values of
the couple moment,
the three forces and the coordinates
of points A, B, C and D.
(3 marks)
Write the resultant Fn of the three forces as a Cartesian
vector.
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 Spring '05
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