Rotation in Two and Three Dimensions

Problems

practice

  1. Write something.
  2. Write something else.
  3. Write something different.
  4. Write something completely different.

conceptual

  1. This is a real problem that I am sure has something to do with precession. There's really only one interesting question in the physics of football (American football — not soccer) When a quarterback throws a "tight" spiral, he has to do it by putting a large rate of spin on the ball and he has to do it by launching it with no angle of attack; that is, the long axis of the ball has to be parallel to the velocity of the ball. When he does that, the ball will execute a motion in which its long axis maintains its tangency to the direction of motion. How can that be? What's causing its rotation? (I would ask, what's causing its precession?)

The Physics Hypertextbook

  • No condition is permanent.