Program
Name and Description
|
Screen
Shot
|
PhysicsContainerTest.html - a basic physics container with a
Car.class, which is a basic subclass of the PhysicsObject.class
|
|
PicTestor.html - a test of the various Images used in the
Charge.class and the Car.class
|
|
PicTestor2.html - a test of the Fader.class, which leaves ghost
images of PhysicsObjects
|
|
PolygonTestor.html - a test of the basic Arrow.class, which creates
an arrow shaped polygon
|
|
RobotGame.html - a game which uses the Robot.class, which is a
subclass of the basic Physics Object. In this game students are
challenged to create vectors which will lead the robot to the prize.
This game was played in the 2001 Physics Olympics. Students are asked
to type in vectors into the robot's "memory" by clicking "Add Line".
When the student clicks "Go!" the robot will execute the student's
directions. Position, velocity, and acceleration vectors are tested.
(Note: I added the arrow later; students do not see arrows on their
screen)
|
|
SDMCalculator.html - this program calculates the data table for the
Physics 151 & 170 Pendulum Lab
|
|
SimpleQuiz.html - this program quizzes students on uncertainties,
statistics, and propagation, as learned in the first week of the
Physics 151 & 170 Lab. (note: a bug in the Image is currently being
fixed; some students may not be able to
see the image; try resizing the screen for now)
|
|
SpringTest.html - this program allows students to run a virtual
driven oscillations experiment. Students are asked to try different
driving frequencies and plot the response curve.
|
|
|
SpringTest2.html - this program is a second version of
SpringTest. It allows students to test natural, damped, and driven
oscillations. (Damped oscillations are shown) Instructions for this
applet are given under:
http://www2.hawaii.edu/~jmcfatri/labs/SpringAssignment.html |
|
UnitJumble.html - This is a silly game that I made up to encourage
my students to remember to put units in their results. The game asks
you to select units from a
list -- without knowing exactly what value you are attaching the units
to!
The resultant paragraph is a hilarious reminder of what happens when
you
have the wrong units. You can also choose random units, where the
program
will select units at random.
|
|
EMGame.html
- This is the first version of the game I wrote for the 2000 Physics
Olympics. Rules and instructions are at
http://www2.hawaii.edu/~jmcfatri/EMrules.html
|
|
Game.html -
this is the final version of the game which was used in the 2000
Physics Olympics. Rules ard instructions are the same as the EMGame,
but the charge is of the opposite sign. Students are asked to
manipulate the electric (E) and magnetic (B) fields to hit a tiny
target at the top of the screen. (Note: you must close the blank window
that first opens when the program starts.)
|
|
PhysQuiz.html
- A Jeopardy - type game, but it's not for the faint of heart! Be
careful! If you get the answer really wrong, the program starts to
insult you! Rules and instructions are available at
QuizRules.html
|
|
FieldDisplay.html - this program displays the field lines and
equipotential lines of any discrete charge distribution (up to 20
charges allowed)
|
|
ChromaticAberration.html
- this program shows how different colored rays shine through a real
lens differently. To use the program, click and drag the white
arrow around. See what happens if you add the red filter or the blue
filter.
|
|
SimpleFieldMap.html - this program shows
how to map a real magnetic field. Select one of the field types from
the selection and drag the little compass around. Every time you drop
the compass, it leaves a little arrow behind. Do this repeatedly and
you end up with a map of the magnetic field.
|
|
AveDampedOscillations.html - this program is
similar to the previous SpringTest.html. In this applet, students can
see what happens to the total energy of the spring system (graph on the
top), simultaneously with the spring animating, and also see a plot of
the position as time goes by (graph on the bottom. Students can also
see what happens when the damping constant is increased or decreased,
by moving the slider on the bottom. To clear the plots, simply press
the "restart" button.
|
|
CompareFall.html - this simple
applet shows two objects falling in the earth's gravitational field.
Which one will hit the bottom first? Make a guess and then hit the
start (triangle) button. You may be surprised!
Hit the
stop (square) to stop the animation and you can reset the applet by
pressing the start button again.
|
|
DampedSpring.html - this applet is
much like AveDampedOscillations. html. Like
AveDampedOscillations, it also shows a damped spring, and has the same
outputs. However, there is one main difference. In the
AveDampedOscillations, I averaged the total energy of the spring
system. In this one I do not. I wrote this program to remind
students that the "exponential decay" they are reading about in their
text is really talking about the average energy. Watch what
happens when the true total energy is plotted!!
|
|
DragNPlot.html - this applet is
designed to help students connect graphs with the motion they see.
Students drag the little car around and observe the plots of its
position and velocity as a function of time. To start, press the
start (triangle) button. Then click on the car and drag it around. To
stop plotting, press the stop (square) button. Then you can press the
start button again to reset the applet.
|
|
DrivenSpring.html
- this applet behaves much the same way as SpringTest2.html. Students
are allowed to choose a natural frequency of the spring, a damping
constant (how much damping the water gives), and the driving frequency
of the motor. Students start the system going by clicking
"apply". The difference is that this applet also includes the
transient solution. (Be wary, some results may seem strange because of
this!)
|
|
ElectrostaticTest.html
- as the name suggests, this is a test of the electrostatic forces. I
wrote this to test the algorithm that computes the electrostatic field.
Here I found that I could by accident have a charge which is not
visible on the screen but still see the effect of them (there are ten +
on the top and ten - on the bottom, but only two are
visible). This bug has not yet been fixed.
|
|
Gedanken1.html
- In this applet, students can place any number of charges on the
screen and observe the effects of both constant forces such as the
gravitational force near Earth, and the electrostatic force.
To use
Gedanken1:
-Add Charges/Masses: use the add menu
to add charges or masses to the screen.
Note that
the charge is in uC! So make sure you make it at least 100 or so uC, or
you won't see much
-Add Springs: use the Add menu. This
is a bit difficult! (I am working on this!) You have to select the two
objects after selecting the menu item. If successful, a line will
be drawn between the objects, indicating a spring scale.
-Add Force: add the electrostatic
force and/or a constant force. (NOTE: YOU MUST DO THIS to see any
forces acting on the objects, charges or not!)
-Delete: use the delete menu to
delete all charges and effects
-Start: press the start (triangle)
button to start animating the objects in the screen
-Stop: press the stop (square) button
to stop any animating
-Investigate: press the investigate
(magnifying glass) to see what the spring scales read at any time
-Strobe camera: press the camera
button to show tracks like the one shown to the right (strobe camera is
on by default!)
|
This can be duplicated by:
1) Adding a charge at (7,7) with mass 1000, velocity 0, and charge 100
2) Adding a charge at (7,1) with mass 1, x_velocity 3, y_velocity 0,
and charge -100
3) Adding an electrostatic force to all objects
4) Pressing the start button
|
Projectile2D.html - this applet shows
the side-by-side comparision of 2D and 1D projectiles. This is intended
to go with a discussion of the components of the motion of 2D
projectiles. Students should notice that the position in the y
direction is the same for both objects. Press the start (triangle)
button to start the animation. Press the stop (square) button to
stop the animation. Press start again to reset from the beginning.
|
|
| ProjectileVelComp.html
- this applet shows the x component, y component, and total of the
velocity vector of a projectile. Press the start (triangle)
button to start the animation. Press the stop (square) button to
stop the animation. Press start again to reset from the beginning. |
 |
ShockAbsorber.html - this applet shows
how a shock absorber behaves. This is intended to go with a
discussion of overdamping, underdamping, and critical damping. Use the
slider to increase or decrease the damping term. Press restart to
reset the program.
|
|
SpringOscillations.html
- this applet is a set of slides which explains how a spring
works. It shows the force and velocity of the spring at several
key moments on the oscillation. Students click "next" when they
are ready to see the next slide.
|
|
SpringTest.html
- as the name suggests, this was a test of the spring force
that was written for Gedanken1. I have another set of spring tests in
this set to test the curly springs shown in some of the other
applets. There is a bug in the spring drawing algorithm for the
curly springs when more than three objects are attached, which I
haven't resolved yet, thus, Gedanken1 got plain old lines to represent
springs.
|
|
Starter.html
- this is my test applet that starts every lesson. Small,
compact, and fast, if users have problems with this program, then they
know that their settings for java are not what I require.
|
|
|
|
|
|
