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UNIVERSITY
Computers bring fun to physics
By Bob Waite
Emerald Reporter
Using computers makes
learning physics fun and makes
teaching physics easier, a Uni
versity professor said
Fourteen Oregon secondary
tear hers w ill Im- given a i trance
to test tliis theory next summer
when David Sokoloff. Universi
ty physics professor, introduc es
them to the S< lentifn Think
ing Implementation and Re
search program
Hut Sheldon High School
students are proving Sokoloff's
theory true
(lathering around a Macin
tosh i omputer on one of the
seven tables in physic s tear her
John Harrell s lab Stephanie
Hole. Tanya Browne and Teresa
Mi Cube analyze the physics
prim iples involved when a
"car" runs down an inclined
plane
While Hrowne readies the
computer. Cole releases the c ar
a bloc k of wood with wheels
down a wooden ramp while
Me Uulio waits to c atch it Be
tween the ramp and the compu
ter. Garrett attaches a motion
detector to measure the car's
veloc itv and feeds the informa
tion into the computer pro
gram The result is a graph on
the c omputer sc rc-c-n and a table
of numliers
Next the three measure the
distance traveled and weigh the
car.
Asked if it would not be
quicker and easier to |ust use a
stop watch to time the cur and
figure out the problems with
pencil and paper, the three stu
dents frown in unison
Certainly not, they say That
would produce had data The
idea is to determine the car's
velocity at various points on its
way down the ramp Doing the
calculations without the com
puter would take much longer
and the potential for human er
ror is greater Data and calcula
tions to show results would
quite likely be inaccurate.
They've already learned to
do the calculations, they say.
Why not let the computer do
the tedious stuff now ?
They enter the remaining
measurements into a spread
sheet that contains the data the
computer collected, in order to
determine the car's time, accel
eration. velocity, kinetic energy
and potential energy While
they finish up, Chris Kwing
plays around because he has
finished his tests
"The gravity of the moon is
about 1.6 meters per second,"
Kwing says, explaining what he
was doing to his spreadsheet.
I h- had made a spreadsheet to
show the distance, time, accel
eration. velocity, force and tra
jectory of a projectile on Karth.
What would happen if it were
on tire moon?
"The computers make it eas
ier It gives you a chance to do
more You < an actually see
what's happening and you
don't have to do the calcula
tions over and over on paper."
Rwing says
When the class bell rings.
McCabe and Browne are still
working on their spreadsheet
and want to stay, but Garrett
says they can work on it later
"Using the old way you'd
hear a moan when it was time
to do this," Garrett says. "And
it the data was hail they'd have
to start over. It took a long
time I think they enjoy work
ing with computers."
"These are tools that have
been available for several
years," Sokoloff said. "What
this workshop does is intro
duce teachers to these meth
ods.”
Sokoloff and Garrett taught
the first workshop to Kugene
area teachers three years ago.
This summer the teac hers will
come from other areas of Ore
gon.
Participating educators will
get the software, a variety of
m ea s u re me n t i n s t r u m e n t s,
computer interface hardware
and teaching manuals. Sokoloff
said.
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