Force and Motion
Click "Go" and an object begins to move from "East" to "West" at constant velocity, leaving the "tracks" of a motion diagram. By clicking and holding on one of the triangles of the "compass rose" you can simulate applying a net force to the puck in the corresponding direction. While you hold the mouse button down, a net force is applied, and the object turns red. When you release the button the net force is again zero. The grid should help you visualize velocity changes of the object in both the x- and y-directions.