The applet on Page 2 shows forces and their Newton's-third-law reaction forces acting on the parts of a system consisting of a box on a table which is standing on the earth. The system is pictured below. Of course, the three parts of the system are not illustrated to scale.

Detailed information on how the applet functions is available under Applet Help on the applet's Help menu.

See "Activities" under Related Items for suggestions on investigations on forces and their reaction forces to be carried out with the applet.

For investigations on forces and free-body diagrams, go to Force/Free-Body Diagrams/Simulate It/Box on Table.