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• Janet Phan Period 3 Physics A 11/15/07 Lab Write Up: Forces I. Introduction This mainly focuses on Newton s three different laws of motion. I was paired up
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Janet Phan
Period 3
Physics A
11/15/07
Lab Write Up: Forces

I. Introduction
This mainly focuses on Newton's three different laws of motion. I was
paired up with Beth Perser and Kevin Kim as my lab partners, who
assisted me to get this lab completed. We practiced on tools that
would help find forces and prove that the three laws were legit.

II. Materials
☺ 3 Force sensor
☺ 1 White board
☺ 1 Kevin Kim's Size 11.5 Vans shoe
☺ 3 Strings
☺ 3 TI-89 Calculator
☺ Water
☺ Force
☺ A 1 foot Ruler

III. Procedures
When the lab was elaborated, my partners, Kevin and Beth, and I went
straight to work on trying to find the force needed to slightly move
Kevin's shoe. We had multiple trials due to the uncertainty on whether
to pull harder or softly move the force censor, and if a mistake was
committed one error would lead to another, which students couldn't
afford to happen. We spent the last 10-15 minutes of class doing this
and in return, we got an estimate of how much force was needed to be
put onto the shoe to slightly move it. After we were done with the
first part of the lab, the class ended just in time and the next time
our class met, we went through another stage of the force lab. We were
paired up with another group that helped us determine the angle for
forces and to theoretically prove that the laws are correct. Once my
partners and I collaborated with another group, our combined group was
then consisted of Risza, Arash, Juan, Kevin, Beth, and I. This stage
was more complicated then expected, we had to get measurements on the
dot and it wasn't as easy as just one measurement, measurements were
taken from the strings and the width and height of every side
possible, because we never wanted to leave any information behind. We
had multiple trials, and when I say multiple, I mean MULTIPLE. It was
complicated because once you had a measurement you have to keep the
objects and sensors in place so you can take another measurement.
After we gathered our information and data, we decided on one of the
trials to use on our labs, and we completed some calculations to get
the angle for the forces.

V. Analysis
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