Push or pull, units, Isaac Newton, effects of forces, forces act in pairs, net & balanced forces, types of forces, gravitational forces, friction, tension, compression, contact forces, solar system & forces, force fields, mass, weight & force due to gravity, calculating weight from mass, measuring forces, magnetic fields & forces, electrostatic forces, lightning & thunder, precautions during storms, videos. Excellent for classroom teaching with a data projector & for use