Exam 1 Winter 2012
Physics 121
Instructors: Hart (section 1) and Vanfleet (section 2)
Name:_CID_
Please circle your section: 1(morning)
2 (afternoon)
Please read the instructions before you begin.
The exam is closed book, but you may use a calculator for
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Physics 121, Sections 1 and 2, Winter 2010
Instructor: Scott Bergeson
Exam #1
January 28 February 1, 2010 RULES FOR THIS TEST:
CID:
Write your CID on this page and on the free response answer sheet.
This test is closed book and closed notes.
You ma
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Physics 121, Sections 1 and 2, Winter 2014
Instructor: Ross Spencer
Exam #1
January 30 February 1, 2014
CID:
Rules for this test; read carefully.
Write your CID on this page and on the homework-style answer sheet.
This test is closed book and closed
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Physics 121, Sections 1 and 2, Fall 2014
Instructors: Michael Ware and Ross Spencer
Exam #1
September 25 September 29, 2014
CID:
Instructions
Write your CID in the space above.
This exam is closed book and closed notes
You may use a calculator for
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Physics 121, Sections 1 and 3, Fall 2015
Instructor: Ross Spencer
Exam 1
September 11, 12, 14, 2015
CID:
Rules: Read carefully. Look over the entire test before you begin.
Dont discuss the test with students who havent taken it.
Write your CID on thi
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Physics 121, Sections 1 and 2, Winter 2015
Instructor: Ross Spencer
Exam #1
January 30 February 3, 2014
CID:
Rules: Read carefully. Look over the entire test before you begin.
Dont discuss the test with students who havent taken it.
Write your CID on
Vector components: sin cos ?
Drop the angle to zero
In the rotated picture:
If the vector lines up with ,
use cos
If the vector is perpendicular to ,
use sin
Same for .
In this example in the tilted picture
= cos and
= sin .
Highlighted items will be printed on Exam 2
Memorize the formulas below for Exam 2
Unit Conversions
Cartesian and Polar Coordinates
in
m
km
mi
hr
ft
=
=
=
=
=
=
2.54 cm
100 cm
1000 m
1.61 km
3600 s
0.3048 m
x = r cos
r=
q
x2 + y 2
= tan1
Vector Componen
Unit Conversions
in
m
km
mi
hr
ft
=
=
=
=
=
=
2.54 cm
100 cm
1000 m
1.61 km
3600 s
0.3048 m
Areas and Volumes
Areas : Rectangle, length L, width w : A = Lw
d2
4
Volumes : Box (length L, width w, height h) : V = Lwh
Circle, radius r, d = 2r : A = r 2 =
Cy
Doing kinematic problems
1.
2.
3.
4.
5.
6.
7.
8.
Draw a picture.
Put a coordinate system on your picture
Write down the constant acceleration equations with time for each
coordinate direction (if youre lucky some of the accelerations will be
zero:
= +
Doing = problems
1. Draw a picture.
2. Draw a free-body diagram (a dotted line around each mass).
3. Indicate with vector arrows on your drawing each force that acts
across the dotted line on the mass. Dont forget gravity.
4. Choose a coordinate system. L
Force Table
Formula forces
Gravity: or
F=ma forces (no
formula)
2
Spring:
Kinetic friction:
Exception: Static friction at the
breaking point: =
Tension:
Normal:
Static Friction
Get these from
=
Chapter Summaries for Physics 121
Introduction to Newtonian Mechanics
Ross L. Spencer
Problem Sets by John Merrill
Brigham Young University
Introduction
These chapter summaries are designed to help physics students better understand
the material in Physic
OK Go This too shall pass
= in every frame
Physics 121
Chapter 2:5-8
My Grade Stinks Why?
There are almost no points that count nowwait
until after the first exam.
Wait 2 days to ask me about missing or messed-up
scores (please)
No clicker scores yet hop
Virtual insanity 4 minutes
F 14 cat shot roosevelt
38 m high dive
Vector introduction despicable me
Mythbusters soccer ball shot from truck
747 Crosswind Landing, Hong Kong
Physics 121
Acceleration Review
& Chapter 3
Exam 1
See announcements page on max
Why symbolic solutions?
You are sitting in an engineering group meeting where the
goal is to design the next Mars lander. You are in charge of
the X-widget. At the last meeting the team decided to use a
5 cm diameter roller in the TMS assembly and you ha
Exam 2, Thursday, Friday, Saturday, Monday
late, 1 PM.
Chapters 3 and 4
Track guy, average vs. instantaneous
Airplane and wind
Mixing bowl, period
Kid hits the wall estimate ?
Physics 121
Chapter 5:1-4
=
finally
Roller coaster
What is the magnitude of
Physics 121
Chapter 2:1-4
The mathematics of motion
Clicker: CC
Calculus review: Khan Academy
Started late?
max.byu.edu, explore it, read the syllabus,
take Reading Quizzes 1 and 2.
Homework 2 is due for everyone tomorrow
night (Friday) at midnight.
Te
Physics 121
Chapter 10:6-8
Strauss
Rotation:
Newton II and Work-Energy
Mustang, 300 Hp, 50% to the wheels,
1600 kg, acceleration at 2.2 m/s and 22 m/s
1 Hp = 746 W, 300 Hp = 224 kW
Bomb: Compare
1
2
2
with 6e13.
Whats ?
Whats ?
Pre-class quiz find and
Physics 121
Chapter 3 (end), 4:1-3
Check statistics on max
We will review the exam on
Thursday, after class
People are still taking it no
discussion
Life in 27 Seconds
= +
Memorize and understand its meaning
Headwind Tailwind
Velocity is a vector they a
Physics 121
Chapter 4:1-6
Review and
Circular motion and frames of
reference
Homework
What does direction mean?
Standard angle, counterclockwise from x-axis
Not enough information given?
Use symbols instead of numbers
Reading, not enough given? Guess some
Physics 121
Chapter 1
+
Motion
+
Story Problems
We have nearly 2 hours lets use them
well
9-10:15 am: hard work; then problem
solving help and questions until 10:45
Pre-class questions- I look at them,
but if I answer them in class-chaos
Some in class, so
Physics 121
Chapter 5:6-8
=
Test back on Thursday discuss
after class on Thursday some
havent taken it.
Where is Chapter 13 in the Chapter
Summaries?
Section 5.6.
Gravity confusion
1. 2 earth radii above the earth whats g?
Speed of crashing, , , ,
Physics 121
Chapter 6: 3-4
=
Homework is challenging
again today
Exam Thursday-Tuesday, 5-6
Professor Death
My written homework says Late,
strike 2.
What does this mean?
We will grade three late written homework
assignments for full credit. These late
a
MATH 236: Discrete Mathematics with Applications
TUTORIAL 8: 2 May, 2013
1. Let P (n) be the statement that
12 + 22 + + n2 = n(n + 1)(2n + 1)/6
for the positive integer n.
(a) What is the statement P (1)?
(b) Show that P (1) is true, completing the basis
Stat 121 Practice Exam 1
1.
Which one of the following will change the appearance of a histogram?
a. Changing the width of the intervals
b. Changing the leaf unit
c. Changing the y axis from frequency to percentage
d. Changing from labeling the endpoints
Problem 1.11
When a car has a dead battery, it can often be started by connecting the battery from
another car across its terminals. The positive terminals are connected together as are the
negative terminals. The co
CHAPTER 2
Motion
1.
Which one of the following is not an area of physics?
a)
Mechanics
b)
Optics
c)
Algebra
d)
Acoustics
Ans: c
2.
Motion necessarily involves
a)
a change in velocity.
b)
a change in speed.
c)
a change in direction.
d)
a change in position
CHAPTER 10
Nuclear Physics
23
11
Na ?
1.
How many protons are there in an atom of
a)
12
b)
34
c)
23
d)
11
Ans: d
2.
How many neutrons are there in an atom of
a)
19
b)
20
c)
39
d)
58
Ans: b
3.
How many electrons are there in a neutral atom of
a)
26
b)
30
c
CHAPTER 6
Waves
1.
Which of the following characterize(s) a wave?
a)
Wavelength
b)
Amplitude
c)
Period
d)
All of these
Ans: d
2.
Wave frequency is inversely proportional to
a)
amplitude.
b)
period.
c)
wave velocity.
d)
all of these.
Ans: b
3.
Wave period