Pat Popovits
3/23/08
Phy120 IN
Centripetal Force Lab Report
I. Introduction
In this lab we will observe the motion of an object moving in a circular motion and
determine whether our observations conform to the theoretical model. The equation for
centripetal force is
F
c
=
mv/r
.
In this experiment
m
will be the mass of the rubber stopper
tied to the end of fishing line,
v
will be the speed of the stopper as it travels in a circular
path,
Fc
is the centripetal force, and
r
is the radius of the travel. We will see that the
stopper will not travel at the same level as the top of the handle due to the force of
gravity. Therefore, the length between the handle and the stopper (
L
) will turn out to be
the vector sum of the radius of travel and the displacement of the moving stopper below
the top of the handle. Likewise, the weight of the washers (
T
) is the vector sum of the
centripetal force and the weight of the stopper.
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 Spring '08
 wormer
 Physics, Circular Motion, Force, stopper, Experimental Fc, V. True Fc

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