Read Section 8.3 in the textbook. The basic concept here is straightforward.
- The total Momentum (summation of all mv's) in a closed system never changes
- Momentum is a vector, the direction of the velocity matters. If you have a head on collision between two moving objects then before the collision one object will have a positive velocity and the other a negative velocity so the total momentum before the collision must equal ( m1v1) + ( m2(-v2))
- That total momentum will equal the momentum of the system after the collision.
Pick up a paper copy of these Momentum Seminar Problems 5-8. As you work through them you can watch this video for an explanation on how to solve them.
The answer key can be found here.
Pick up a paper copy of momentum problem set #2. When done review your answers here.