Drag on the ball to change the length.
Drag on the bar to change the angle.
Click on the clock to reset the timer.
The mass of the object is fixed to be \(m = 1kg\).
The grey horizontal line represents the lowest level of the pendulum trajectory, used as a reference level for height measurement.
Use the clock to time 10 oscillations and deduce the period. Repeat for a different length and see how the period changes.