Oregon State University
Physics 201 Midterm Exam #2
Fall Term,
l
2009
Form A
General directions
:
Only one sheet of paper (8.5” x 11”—both sides), with only
handwritten notes, may be used during this exam.
You may use
any kind of calculator, provided that it is not part of a PDA, cell phone, palmtop or laptop—and that it is not transmitting any information wirelessly.
Physical constants and other possibly useful information are provided here.
Answer Question #1 first.
Physical constants and other possibly useful information:
g
= 9.80 m/s
2
Question #1:
What is the Form designation (A, B, C, D, E, F or X) for your exam—shown at the top of this page?
Write this letter in the answer box for Question
1
on the first answer sheet in the exam booklet.
For questions 2
16
:
For multiplechoice or true/false items, write the letter of the
one best answer in the appropriate box on the answer sheet.
For
t
questions requiring
short
answers (a word or
t
short phrase only), write those in the spaces provided.
Youʼre graded on your answers only—no need
to show work.
Assume 3 significant digits and SI units in all numeric answers unless instructed otherwise.
True/False
(4 points each)
2.
True or false?
When the speed of a moving object is
increasing, velocity can be negative.
T
3.
True or false?
A projectile launched vertically down
ward has a different acceleration as another projectile
launched horizontally.
F
4.
True or false?
If
C
=
A
+
B
(all vectors), then it must
be true that

C
 ≤

A
 + 
B
.
T
5.
True or false?
r
When an objectʼs
velocity is constant,
so is its acceleration.
T
6.
True or false?
If a bullet is fired at a 29.3° angle from
shoulder height along a level road, its impact speed on
the road will be greater than its initial speed from the
gun.
T
7.
True or false?
The vertical displacement of a projec
tile is always zero at the peak of its motion.
F
Brick A:
19.6 m/s
Brick B:
22.6 m/s
Short Answer
(4 points each)
8.
Vector
V
A
has a magnitude of 5.00
m, directed at 30.0°
above the positive
x
axis.
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 Fall '08
 Staff
 Physics, m/s, initial speed, ΔT, Radian, Δy

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