I will be out Friday - Wednesday. I will return on Thursday Feb 26. I will be accessible via email in case you have questions.

The assignments below are all from Physics Classroom. You should do these in the order that they are listed. It would be wise to take a few notes as you work through the assigned activities. Everything is due on Thursday 8:00am (block 7) or Friday 8:00am (block 2). Formulas are on the board for each type of collision.

All of the problems we have worked so far are examples of Perfectly Inelastic Collisions. This means the objects stick together after the collision and move as one object. In Perfectly Inelastic Collisions momentum is conserved.

HINTS

*momentum is a vector and can be positive or negative (west is negative, east is positive)

*For the problem solving (sudden death mode) activities, you should understand that final system momentum is equivalent to initial system momentum. Go ahead and enter the final system momentum and use that to find the other missing pieces.

*Use a whiteboard! Draw a picture!

Perfectly Inelastic Collisions

The first activity is reinforcing your understanding of Perfectly Inelastic Collisions.

Hit and Stick Collision Analysis Sudden DeathMode

Explosions

Moving on to Explosions….Explosions are the opposite of Perfectly Inelastic Collisions. In an explosion, the objects are initially stuck together and are exploded apart. Momentum is conserved.

Collision Carts Interactive (This is an online lab experiment using this worksheet. Make sure EXPLOSION selected at the bottom of the screen.)

Exploding Carts Concept Builder Sudden DeathMode

Elastic Collisions

Now you are ready to learn about Elastic Collisions. Elastic collisions are collisions where the objects bounce (or even repel) each other after the collision. In Elastic Collisions, momentum AND kinetic energy are conserved.

Collision Carts Interactive (This is an online lab experiment using this worksheet. Make sure ELASTIC selected at the bottom of the screen.)

Elastic Collisions Problem Solving Sudden DeathMode

Inelastic Collisions

And finally….Inelastic Collisions. These are different from Perfectly Inelastic Collisions because the objects do not stick together. In Inelastic Collisions momentum is conserved.

Collision Carts Interactive (This is an online lab experiment using this worksheet. Make sure INELASTIC selected at the bottom of the screen.)

Collision Carts Concept Checker Sudden DeathMode