PHY 2053C College Physics A
L1intro,Ch1
Fall 2004
Motion, Forces, Energy, Heat, Waves
Dr. David M. Lind
Dr. Kun Yang
Dr. David Van Winkle
Today:
1) Course Organisation and
2) Introduction to Units
3) Coordinates on the world
Course Organisation
Lectures:
19
Experiment I:
Vectors
Goals
•
•
Practice resolution of vectors into their components and addition of vectors
Visualize these processes on a force table
Introduction and Background
One of the most important concepts in physics is the concept of vector q
50
Experiment VIII: Specific Heat and Calorimetry
Goals
•
Learn the experimental method of calorimetry
•
Determine the specific heat of aluminum, brass, and steel with calorimetry
Introduction and Background
Heat and Specific Heat:
The amount of heat requ
Work done in lifting a block
Equipment:
Motion sensor, force sensor, LabPro, laptop, mass set, cage.
Part 1: Predictions
Imagine you are holding a block of mass 2 kg initially at rest. You then pull upwards, lifting the block
by 50 or 60 cm, and end with
II.
Setup and Procedure:
1. Switch on the laser source about 15 minutes before the experiment is due to start.
This ensures that the intensity of light from the laser source is constant.
2. Allow the laser beam to fall on a slit formed in the screen provi
Week #6
68
Planetary Orbits
You will need to use a laptop in this activity, so form two groups of 2 or
3 at each table.
The planets follow slightly elliptical orbits around the Sun. The orbits
can be described in terms of the semi-major axis (a) and eccen
10)
Fig 3
sin
cos( t )
- (14)
Similarly, the secondary slit will produce a field
sin
E2 = A
cos( t 1 ) - (15)
2
at the point P, where 1 =
d sin represents the phase difference between the
disturbances from two corresponding points on the slits; by corre
Testing Newtons Second LawCan
We Neglect Friction?
m1
Earlier we looked at the modified Atwoods machine, shown
to the right, to get some qualitative feel for Newtons Second
Law. We analyzed this for the case of no friction, an ideal
Modified Atwoods
m2
st
write E =
a sin
n
sin
sin
2 = nE
=A
0
a sin
2
E 0 sin
- (8)
where,
A = n E0
and =
E=A
thus,
a sin
- (9)
sin
cos( t )
-(10).
The corresponding intensity distribution is given by
sin 2
2
I = I0
- (11)
where I0 represent the intensity at = 0.
I.2. Po
Pirate Treasure
Our two drunken pirates have another treasure chest to haul back to their ship. By this time, however,
Bill has sobered up and realizes that they need to head due East. Unfortunately, Jack is still swigging
rum and pulls 40 North of East w
Experiment 22
Diffraction at a single and double slit
Apparatus:
Optical bench, He-Ne Laser, screen with slits, photo cell, micro meter.
Purpose of the experiment:
To measure the intensity distribution due to single and double slits and to measure the sli
Newton's Second Law Problems: We will be working on these problems during the next several
classes. Please bring them to each class.
Start all problems with a complete free body diagram.
1. Boxes A and B, with masses mA and mB can move on a horizontal fri
9. What would be effect of using white light instead of monochromatic light?
10. Why is it necessary to use a lens of large value of R in this experiment?
Reference:
1. Physics ,M.Alonso and E.J.Finn, Addison-Wiley, 1992
2.
Fundamentals of Physics , D.Ha
Carefully write down the fit equation and consider the following questions.
1. Is a linear function a good fit to the data?
2. Compare the fit equation to the equation for a straight line: y = mx + c. What can you conclude
about the relationship between T
Appendix: Lasers
Introduction:
The light emitted from a conventional light source is(like sodium lamp) is said to be
incoherent because the radiation emitted from different atoms do not, in general, bear any
definite phase relationship with each other. On
can adjust telescope on an object which is at very large distance. Level the
spectrometer and prism table on which grating is mounted using a spirit level. Fig. 5
schematically shows the arrangement of the grating and the spectrometer.
2. Switch on the po
4. Multiple forces, varying direction of motion. The situation is the same as in Problem 3, except that now we are going to
account for friction. The coefficient of kinetic friction between the ice and the boats runners is k=0.03.
(a) What is the work don
sin 2
2
represents the diffraction pattern produced by a single slit and the second term
represents the interference pattern produced by N equally spaced slits. For N=1 eqn. (3)
reduces to the single slit diffraction pattern and for N=2, to the double sl
Work Problems
1. Constant force in direction of motion. An iceboat of mass M = 250 kg is moving in the
direction of the wind (see diagram below.) The wind exerts a constant force F = 150 N as the boat
moves a distance D = 100 m.
(a) What is the work done
Experiment 23
Diffraction Grating
Apparatus
Spectrometer, grating, sodium lamp, mercury lamp, power supply for spetral lamps,
magnifying glass.
Objective of the experiment:
a. To calibrate the grating spectrometer using the known source (Hg source) of lig
A ball of mass of 0.50 kg moves along a straight line and is acted upon by a net force of F = (6.00 N) +
(1.5 N/m) x.
When the ball is located at x = 2.00 m you notice that it has a speed of v = 4.00 m/s.
Sketch the force as a function of the position, pa
Week #7
74
Work and kinetic energy
Introduction
The kinetic energy (K) of an object of mass m, moving with velocity v, is defined as
K = 1 mv 2 .
2
The work done by a net force Fnet(x) in moving the object from an initial position x0 to a final position x
Light waves emitted with in the laser at wavelengths such as 6328,11,177 and 11,523 A0
will occasionally be omitted parallel to the tube axis .Bouncing back and forth between the
end mirrors, these waves will simulate emission of the same frequency from o
Pulsars
During the Fall of 1967 Jocelyn Bell Burnell, a
graduate student at the University of Cambridge, and
her mentor Prof. Anthony Hewish, were analyzing data
from a newly constructed radio telescope when they
noticed a sequence of pulses with a short
The model
When an object has reached terminal velocity, the downward pull of gravity exactly balances the upward
push of air resistance:
That means that you can calculate the force of air resistance easily, if you know the mass of the falling
filters.
Now
Experiment 19
I-V Characteristic of Solar Cell
Observations and Results
Table 1
S.No.
Illumination 1 : Variac Voltage
Volts
Current Power
(mV)
(mA)
(mW)
Illumination 2 : Variac Voltage
Volts
Current
Power
(mV)
(mA)
(mW)
Calculations :
1.
Fill up Table 1 a
Newton's Second Law and The Force Plate
A force plate is essentially a digital bathroom scale that connects to the Labpro. When you stand still on
the plate, it will read a value equal to your weight, mg. Suppose now that you start with bent knees,
straig
1
qn
where q is the charge.
RH =
(3)
From Equation (3), it is clear that the sign of charge carrier and density can be estimated
from the sign and value of Hall coefficient RH. RH can be obtained by studying variation
of VH as a function of I for given B.
Relative Motion Problems
1. It is a rainy day with no wind blowing. You are driving your car at a speed of 10 m/s. You notice
that the rain appears to be coming at you at an angle of 50 relative to the vertical. How fast is the
rain falling toward earth?