I am doing a report or physics homework where I have to talk about the rotation of an Olympic high diver and am slightly confused as to how it all works. I have a few questions which would help clarify.
1) So I know that in the air, angular momentum is conserved as in the air the diver experiences no torques. This means the momentum is provided by the jump. Is the torque provided because the center of mass of the diver is in front of their contact point on the springboard so when the springboard provides the force(and person provides force on springboard), the force is applied at a distance and at an angle to the center of mass, meaning torque is provided, allowing them to spin in the air
2) Does simple harmonic motion and resonance apply for the springboard where the diver swings their arms during the run up in time with natural frequency in order to increase amplitude/displacement which in turn increases restoring force so it generates a larger torque for the diver
3) I also need a brief starting point for how twists along the vertical axis(head to toe) is created to get me started. I found out it works similar to the way a cat can rotate in the air but I don't fully understand. Just a couple sentences as a starting point will do.
change in L = torque * change in time
The Attempt at a Solution
I have said what I have thought in the questions