PASCO ME-9833 Physical Pendulum Set - Manual (Page 27)

Physical Pendulum Set Model No. ME-9833
27
®
Data Section
Length of pendulum bar: 28 cm
Calculated value for length that gives minimum period: 8.0829 cm
Measured value for length that gives minimum period: 8 cm
Percent difference: 1.02%
Questions
1. What is the percent difference between the calculated value for the length that gives
minimum period of oscillation and the measured value for the length?
The percent difference between the calculated value for the length (8.0829 cm) and the measured
value for the length (8 cm) that gives minimum period of oscillation is 1.02%
2. Would a heavier bar or a lighter bar with the same dimensions have a different value for
the length that gives minimum period of oscillation? Why or why not?
No, a heavier or lighter bar with the same dimensions should have the same value for the length that
gives minimum period of oscillation. Mass is not a factor in the calculation of the length for
minimum period.
1
12
------L
2
L
cg
2
2L
cg
2
– +
1
12
------L
2
L
cg
2
– 0 = =
L
cg
1
12
----------L =