Khan Academy on a Stick
Impacts and linear momentum
Linear momentum. Conservation of momentum. Elastic collisions.

Introduction to Momentum
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What momentum is. A simple problem involving momentum.

Momentum: Ice skater throws a ball
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A simple conservation of momentum problem involving an ice skater and a ball

2dimensional momentum problem
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An example of conservation of momentum in two dimensions.

2dimensional momentum problem (part 2)
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We finish the 2dimensional momentum problem
Momentum
Depending on your view of things, this may be the most violent of our tutorials. Things will crash and collide. We'll learn about momentum and how it is transferred. Whether you're playing pool (or "billiards") or deciding whether you want to get tackled by the 300lb. guy, this tutorial is of key importance.