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Physics 1710.003
Fall 2006
Final Examination
Name:
Student ID #:
Scantron Instructions:
1.
Write your name clearly in the space provided.
2.
Write and bubble in your student i.d. number in the box provided, starting in the
first column and leaving the last two columns blank.
3.
Bubble in your KEY ID (which is
A
) in the box provided in the upper left corner.
This test consists of 16 equally weighted multiplechoice questions.
Show all of your
work on the pages provided.
Don’t hand in any extra sheets or other paper.
Suggested procedure for solving the problems:
1.
Read each problem carefully and make sure you know what is being asked before
starting the problem.
2.
Draw a figure for the problem.
3.
List the parameters given.
4.
Write down the equations to be used.
5.
Solve for the answer algebraically
6.
Substitute numbers into you final equation and circle your answer.
WORK THE EASY PROBLEMS FIRST!!
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A rifle is aimed horizontally at the center of a large target 60 m away. The initial
speed of the bullet is 240 m/s. What is the distance from the center of the target
to the point where the bullet strikes the target?
Neglect air resistance.
a.
48 cm
b.
17 cm
c.
31 cm
d.
69 cm
e.
52 cm
2.
The only two forces acting on a body have magnitudes of 20 N and 35 N and
directions that differ by 80
°
. The resulting acceleration has a magnitude of
20 m/s
2
. What is the mass of the body?
a.
2.4 kg
b.
2.2 kg
c.
2.7 kg
d.
3.1 kg
e.
1.5 kg
3.
A 0.50kg mass attached to the end of a string swings in a vertical circle
(radius = 2.0 m). When the mass is at the lowest point on the circle, the speed of
the mass is 12 m/s. What is the magnitude of the force of the string on the mass
at this position?
a.
31 N
b.
36 N
c.
23 N
d.
46 N
e.
41 N
4.
A 1.5kg block sliding on a rough horizontal surface is attached to one end of a
horizontal spring (
k
= 200 N/m) which has its other end fixed. If this system is
displaced 20 cm horizontally from the equilibrium position and released from
rest, the block first reaches the equilibrium position with a speed of 2.0 m/s.
What is the coefficient of kinetic friction between the block and the horizontal
surface on which it slides?
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This note was uploaded on 09/07/2010 for the course PHYS 1710 taught by Professor Weathers during the Fall '08 term at North Texas.
 Fall '08
 Weathers
 Physics, Magnetism

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