Momentum (Linear and Angular)

Annotations:

• Think of energy as a bank account. Energy can be withdrawn, at which point it changes form but it does NOT disapear 

Annotations:

• (if the sum of external forces = 0 is negligible AND no mass enters or leaves)

1. If ΣWork > 0 then there is ΔP(>0)
2. 2 Body Collisions (Linear Momentum)
   1. Elastic
      1. A perfectly elastic collision is defined as one in which there is no loss of kinetic energy in the collision
         1. One Dimensional
         2. Two Dimensional

            1. Attachments:

               • /mindmap/1668434/untitled
               2. To find theta between two elastic collisions, use
         3. To find velocities, we use relative velocity trick, (v2 − v1)f = −(v2 − v1)i
   2. Inelastic
      1. An inelastic collision is one in which part of the kinetic energy is changed to some other form of energy in the collision.

1. M= Kg
2. V= M/s
3. Kgm/s

1. Moment of Inertia - Kg x meters^2
   1. The rotational analog to mass- it represents an objects rotational inertia. An object's rotational inertia is determined by the chosen axis of rotation and is additive.
      1. Parallel axis theorem: The moment of inertia of a parallel axis is equal to the moment of inertia of an object's center of mass + the total mass x the distance between the center of mass and the parallel axis of rotation
2. Angular Velocity- ω
   1. Rad/s -> = V/r