This is a simulation of various types of round objects rolling on an adjustable inclined plane. It is optimized for use on an iPad. Use the check boxes to choose between one and five objects. All objects start from the same initial position - so you won't be able to see the individual objects until they start separating from one another. Use the check boxes at the left edge to start, pause, and reset the animation. Adjust the mass and radius of the object with the sliders. Also use sliders to adjust the angle of incline, the animation speed, and the time. [br][br]It is assumed in the simulation that the coefficient of static friction between the object and the incline is sufficiently large to ensure rolling without slipping. This is not a realistic assumption at very large incline angles.