When the axis is tilted, the component of the gravitational acceleration g that is parallel to the axis gpar is rendered ineffective by the fact that the axis is fixed (see fig. below). The
remaining component that is effective geff is given by the following equation:
The period of oscillation of the pendulum:
Assumption in Hanoi g = 9.81.
With α = 0. Calculation of the effective pendulum length Leff for L = 300mm and L = 445mm.
geff = g = 9.81
Use formula (2):
gmoon = 16.6%g = 1.625
Based on tables and graphs
We calculate it with a rotation angle of 79 degrees
The pendulum will swing like it is on the moon