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PHY107 SPRING 2009 EXAM 1
February 6, 68 p.m.
Circle your instructor’s name
:
Prof. Ia Iashvili
Prof. Gottfried Strasser
Prof. Athos Petrou
PRINT YOUR NAME
LAST NAME _______________________ FIRST NAME_______________________
SIGN YOUR NAME
_________________________________
STUDENT ID NUMBER
___________________________________
INSTRUCTIONS
•
This is a closed book exam except that you are allowed one 8.5”x11” sheet with
whatever you wish to write on it.
•
There are 4 problems – you must attempt them all.
•
Allow approximately 20 minutes for each problem.
•
You must show ALL your work to receive full credit.
•
Numerical answers must have the right units and the appropriate number of
significant figures.
•
Use the back of the problem page if you need more space and mark OVER on
the front side to indicate that there is material at the back side.
•
Enter your answers in the box at the bottom of each page.
PROBLEM
NUMBER
MAXIMUM
SCORE
YOUR SCORE
GRADER
1
25
2
25
3
25
4
25
TOTAL
100
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P1.
A drunken sailor starts from point O and walks as follows: 1) 4.0 paces North,
2)
7.1 paces Northeast, and 3) 8.0 paces West.
Each pace is 1.0 m long.
a.
(2) Determine the vector
1
r
G
that describes the first part of the walk (4.0 paces North).
Use unit vector notation.
b.
(3) Determine the vector
2
r
G
that describes the second part of the walk (7.1 paces
Northeast).
Use unit vector notation.
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 Spring '10
 IA
 Acceleration, Velocity, Prof. Gottfried Strasser Prof. Athos Petrou

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