Vectors 
Here is a great program for adding vectors from PhET. They also created a lunar lander game. Make sure to turn vectors on, and see what your high score is! What happens if you throw a ball at 100 km/hr out of the back of a truck driving 100 km/hr? Here is a movie in Japanese that answers that question. Here are three movies. The first shows how to add two vectors, the second shows the components of a vector, and the third shows the parts of a vector that are parallel and perpendicular to another vector. That last video will be useful when we learn about friction and blocks sliding down ramps. Here is the vector addition worksheet. 
Student Made Web Pages Vectors and Components of Vectors (VC) Vector Addition (MW)

