1
OBJECTIVE
To analyze the motion of an object in FreeFall by:
1)
Analyzing the corresponding equations of motion.
2)
Calculating the velocity at different times by using:
a)
the tangent method
b)
the equation of motion x = x(t)
c)
graphical methods (
t
x
v
o
t
∆
∆
=
→
∆
lim
)
3)
Calculating the acceleration of gravity ‘g’ and comparing to the expected value of
9.80 m/s
2
.
THEORY
Any object moving under the influence of gravity alone, regardless of its initial position, is said to be
moving in freefall.
The acceleration of an object in freefall near the earth’s surface is nearly constant and
approximately equal to g = 9.80 m/s
2
.
In this lab you will analyze the motion of an object moving in free
fall by using an apparatus called the Behr FreeFall.
The object moving in freefall is a ‘bob’ that will
leave a trail of sparks on a wax paper as it falls through some height H.
The sparks will be generated by a
spark timer set at a frequency of 60Hz (60 sparks per second).
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 Spring '11
 Luna
 Acceleration, data points, vave, Vave vs, data point Xo

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