PASCO ME-6694 TORSION PENDULUM - Manual (Page 12)

8
Torsion Pendulum 012–06339A
Table 1.1
Calculation of torsional spring constants of the wires (κ )
Run wire diameter slope of κ
(inches) F vs. angPos (m) (N·m)
1 0.032
2 0.047
3 0.062
ä Note: Click the Autoscale
button on each Graph display if
necessary.
Analyze the Data
1. Use the following formula to calculate the torsional spring constant ( κ ) for each wire and
record in Table 1.1:
where l = the length of the lever arm in meters (the distance from the axis of the pulley to the
groove of the pulley) and F = force in expressed in newtons, and
θ ι n the angular displacement
at a force F.
κ
=
F
θ