PASCO ME-9215B Photogate Timer - Manual (Page 35)

012-06379B Photogate Timer
31 ®
Notes - on Procedure
f
In order to mantain a constant D throughout the
experiement, It is recommended that the Photogate
Timers be held down to their respective locations by
means of tape.
The tables below list the results from two experiemtnal
conditions. The value of each parameter was the average
derived after numerous trials.
Table 5.1
d (cm) = 100 D (cm) = 80 h (cm) = 1.3 L (cm) = 12.6
θ = 0.013 rad
m t
1
t
1
+t
2
t
2
v
1
v
2
a
avg
F
g
(g) (s) (s) (s) (m/s) (m/s) (m/s^2) (N)
180.2 0.35 0.57 0.22 0.36 0.57 0.12 1.66
200.2 0.35 0.57 0.22 0.36 0.57 0.12 1.84
220.2 0.35 0.57 0.22 0.36 0.57 0.12 2.03
240.3 0.35 0.57 0.22 0.36 0.57 0.12 2.23
Table 5.2
d (cm) = 100 D (cm) = 80 h (cm) = 2.6 L (cm) = 12.6
θ = 0.026 rad
m t 1 t
1
+t
2
t
2
v
1
v
2
a
avg
F
g
(g) (s) (s) (s) (m/s) (m/s) (m/s^2) (N)
180.2 0.25 0.40 0.16 0.51 0.80 0.24 1.67
220.2 0.25 0.41 0.16 0.51 0.80 0.24 2.00
261.6 0.25 0.41 0.16 0.51 0.80 0.24 2.43
Exp 5 - The Force of Gravity
Notes - on Analysis
c
Yes. Yes. Yes. g
≅ 9.33 m/s 2 in both cases.This
value is approximately 5% below the established value
of 9.80 m/s
2
.These results however seemed to reaffirm
that gravitational acceleration is for all practicality
constant for different masses and altitudes near the
earth’s surface. Try repeat the experiements for higher
values of h.