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Cyber-chess a chess instruction site

Momentum - web-based activities to make you think!

Roller-coaster fun!

Go to http://www.funderstanding.com/k12/coaster/ .
Get the roller coaster working.
- Does the strength of gravity change how it works?
  - If so how and why?
- Does the mass affect how it works?
  - If so how and why?

Conservation of Momentum in Different Inertial Frames

Go to http://www.phys.hawaii.edu/~teb/java/ntnujava/collision1D/collision1D.html
- Watch the collisions and experiment by changing the mass and velocities of the balls.
- What happens to the velocity of the centre of mass during a collision?
- What happens to the velocity of the centre of mass when one ball collides with the fixed barrier?
- Where has the momentum 'gone' during the collision with the fixed barrier?