When you have measured the oscillations you should use your data to find a value for k. Use your value for k to find the number of oscillations it takes for the aamplitude to halve, that is the number of oscillations for 75% of the initial energy to dissipate?
What is that question saying? can someone explain please for me step by step.
Then it says assuming the pendulum will be wound up when it loses 75% of it's enrgy you can find the time elapsed between windings?
HOW?