PASCO ME-9215B Photogate Timer - Manual (Page 40)

36
Photogate Timer 012-06379B
®
Table 8.2
d = 100 cm h = 2.6 cm
D = 80 cm L = 12.6 cm
θ= 0.026 rad
m t
1
t
2
v
1
v
2
E
k1
E
k2
E
k2
-E
k1
ΔΔΔΔΔ(mgh) % Error
(g) (s) (s) (m/s) (m/s) (J) (J) (J) (J) (%)
180.2 0.25 0.16 0.51 0.80 0.02 0.06 0.03 0.04 5.67
220.2 0.25 0.16 0.51 0.80 0.03 0.07 0.04 0.04 7.32
261.6 0.25 0.16 0.51 0.80 0.03 0.08 0.05 0.05 5.16
h
Yes. The experiemental data indicated that potential
energy was consitently transformed into kinetic enery.
There was however a loss of 5% to 7% in energy . This is attributed to experiemental error as well measurement
as loss of energy due to friction between gliders and air
track.
Figure 9.1 Spring Constant Notes - on Analysis
The results of the each portion of the experiement is pre-
sented to the right.
Table 9.2 Potential Energy vs. Kinetic Energy of Spring Mass System
X
1
= 104.2 cm K = 7.52 N/m Flag Width = 3.8 cm
m Spring Stretch t
avg
v
avg
K.E. P.E. % Error
(g) (cm) (s) (m/s) (J) (J) (%)
211.5 5 0.13 0.29 0.01 0.01 4.6
211.5 10 0.06 0.60 0.04 0.04 0.0
211.5 15 0.04 0.88 0.08 0.08 3.3
211.5 20 0.03 1.18 0.15 0.15 1.9
231.5 5 0.13 0.29 0.01 0.01 -3.7
231.5 10 0.07 0.57 0.04 0.04 0.0
231.5 15 0.04 0.86 0.09 0.08 0.0
231.5 20 0.03 1.13 0.15 0.15 1.9
Exp 9 - Elastic-Kinetic Energy