Here are a few different examples of spring physics. The first example is of a box connected to an invisible spring that is connected to the top of the ramp. The next two examples show how multiple springs interact with one or more objects.
Instructions
Click on the application.
Left and right arrows will increase and decrease the incline, respectively.
Space bar will launch the box on the invisible spring.
Space bar again will reset the box to the top.
Instructions
Click on the application.
Click and drag the red or blue circles to play with the springs.