Chapter 9

3. A wheel or disk that spins rapidly around one axis while being free to rotate around one or two other axes
4. Any time two objects come into sudden contact with each other
7. Conservation of momentum, where the momentum of one object is balanced by the momentum of another object in the opposite direction
9. When only the forces that are involved are internal forces
10. Careful maintenance of a natural resource to keep it from disappearing
12. The direction of a spinning object can be changed by applying what?
13. According to what theory can a bat change the ball's Velocity?
15. momentum If the net force is zero, this is constant if the net torque acting on an object is zero
17. Product of the average net force and the time interval over which force acts

1. What makes the angular momentum change?
2. Impulse acting on an object is equal to object's final momentum minus the object's initial momentum
4. A condition which does not gain or lose mass
5. A winding ___ where an object spins around its longer axis
6. Law allows for connections between conditions before and after an interaction
8. A unit of measurement used to specify the size or intensity of an event
11. Product of the object's moment of inertia and the angular velocity
14. This accelerates ions in an electric or magnetic field. Force exerted increases over time
16. Conserved in a closed, isolated system, regardless of the velocities of the objects before a collision