PHYS 220 General Physics I
Work and kinetic energy
Fall 2014
Assigned Reading: Ch 6, sections 1& 2
Lecture 8
Midterm Exam 1 is approaching
When: Wed Sept 24, 8:00-9:30 PM
Where: Elliott Hall of Music
Exam will cover CHs 1-5 of the book and may include som
PHYS 220 General Physics I
Reference frames, applications, Detecting Acceleration
Fall 2014
Assigned Reading: Ch 4, sections 3-5
Lecture 6
Relative frames
r
v
ri
z
100 m in 10 s
rf
y
x
f
i
r ry ry 100 m
10 m/s
Average speed: vave
t
t
10 s
Phys220 Fall20
PHYS 220 General Physics I
Introduction
Fall 2014
Assigned Reading: Ch 1 & Ch2 S1,2
Lecture 1
What we are covering this semester:
Introductory physics, using mostly algebra
(not calculus), which includes:
Motion & forces
Energy & momentum
Rotations & osci
As shown in any freshman calculus textbook, the differential arc length ds
along a curve y = y(x) is
l (l2
1 ._
V dx
The arc length from x = 0 to x z )t, then, is simply
s = H 1+y2 a.
0
In 1914 the American mathematician Edward Kasner 08781955) showed
how
STUDY PROBLEMS
1) The drawing shows a crystalline slab (n = 1.402) with a rectangular cross section. A ray of light
strikes the slab at an incident angle of 1 = 44, enters the slab, and travels to point P. This slab is
surrounded by a fluid with a refract
Alphabetical Statistical Symbols:
Symbol
Text
Equivalent
a
Y- intercept of least
square regression line
Slope of least
squares regression
line
b
B (n, p)
Binomial
distribution with
parameters n and
p
c
n
C
C
r
n, r
Cov (X, Y)
CV
df
Meaning
n-c-r
n-c-r
Cov
lin02822_apdx.qxd
10/22/01
7:57 AM
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Appendixes
TABLES AND DATA SETS
A
B
C
D
E
F
G
H
I
Binomial Probability Distribution
Factors for Control Charts
Poisson Distribution
Areas under the Normal Curve
Table of Random Numbers
Students t Distribution
Cr
Hello: It is Greg again.
Please draw pictures and describe wat is going on. I just got the equation r hat 3 r/mag r,
but a brief lesson in vectors would be nice to eathc'h up to stuffbetow I need.
Given psoition vector A 3 unit vectir i hat and position v
S
g
, 1 (part 1 0f 3) 15 mars
Aha) 2.4 kg object moving, With a: epwd of
5 SA m/s militias With 3(a) 32.14 kg object mew
" mg with a veieeity 0f 7.3: m/s in a direction
4334.72716a from the initia! irection of making
of the 2.4 kg obiect.
2.41 kg
Experiment #9: RC and LR CircuitsTime Constants
Purpose: To study the charging and discharging of capacitors in RC circuits and the growth and
decay of current in LR circuits.
Part 1Charging RC Circuits
Discussion:
A capacitor stores separated charges for
[i.\',r)err'menr E4 Purdue Uni versin Physics 21900, 22 I 00 and 25200 2013/2014 75
:1 .l 1.7. The computer should automatically t the theoretical function to the experimental data.
The computer uses the Inverse Exponent Fit formula that has the fol
1. The resistors in parallel have the smaller net resistance. It will be 4 times
smaller. For resistors in series, the total resistance R is given by the equation
Rtotal= R1 + R2 +R3+ if the resistance of each resistor is 5 ohms, then the
total resistance
1. Let the charge on A = Q Coulomb and d the distance between the charges in
m.
Charge on B = 2Q
The electrostatic force between them is given by F= (1/ 4) Q1x Q2/ d^2 =
9x10^9( Qx2Q)/d^2 Newton.
From this equation we can deduce that the force is mutual a
Answers to Conceptual Questions
1. The magnetic force acting on each pole of the magnet will be F = m B, where 'm' is the
pole strength and B is the strength of magnetic field. Due to the uniform magnetic field;
the bar magnet experiences a moment couple
Answers to Conceptual Questions
1. As the magnet is initially very far away; the initial magnetic flux in the coil is zero and as
it passes through and reaches its final position very far away again the magnetic flux
through the coil will be zero. The net
Answers to Conceptual Questions:
1. Sound could diffract because diffractionoccurswhenawaveencountersanobstacleorslit
suchasadooropening.Thesizeoftheobstacleorslitmustbecomparabletothe
wavelengthofthewaveforittobendaroundtheobstacle.So,soundwaveswilldiffr
Answers to Conceptual Questions:
1. No it is not possible to polarize sound waves. It is impossible to polarize sound waves
because sound waves are not transverse waves like electromagnetic waves. The reason
electromagnetic waves can be polarized is becau
Answers to Conceptual Questions:
1. In order to reduce the focal length of a converging lens you would have to change some things.
You could combine the converging lens with a second converging lens and the combined focal
length would be smaller because i
Answers to Conceptual Questions:
1. If we assume the concept that one photon knocks out one electron only then, the
number of electron emitted should only depend on the intensity of the radiation
absorbed and it should not depend on the frequency once the
Answers to Conceptual Questions
1. When the switch is open the circuit is a simple circuit with two light bulbs in series with
some unknown resistance. No current will run through the branch where the switch is
open and both bulbs A and B will have the sa