Click and drag from the box to add a force, then press and hold space to apply those forces! Press c if you want to clear the forces. For extra fun, hold down the mouse and space bar, then spin the mouse around. Make sure there is only 1 force acting on the box. The box should then be affected by centripetal force. :)
Just learning about Newton's Second Law in Physics. Thought I might as well try it out on Scratch!