its a ball
it's a fulcrum
Keep the Ball Rolling was created in 1979.
It is an example of inertia.
yes it does. i just did the experiment.
its a ball
its a ball
beacuse they have wheel for rolling them
i think it is a simple machine
lever
Inclined plane
it's a fulcrum
It is a wheel and axle
On a Rolling Ball was created in 2002.
Bearing principle is very simple: objects rolling easier than slide.
Keep the Ball Rolling was created in 1979.
stops rolling?