Did you even notice it said harmonica? Try these tasty questions:
- Kinetic Energy to Oscillation
- Spring Constant from Oscillation
- Vertical Oscillation from Timer
- Vertical Oscillation Problem
Then, using the Phet simulation (Springs and Masses) determine the mass of the three unknowns (pink, blue, and orange) as well as the acceleration due to gravity on Planet X.
Then try these waavvy questions.