Forces and Their Effects | Year 7 Physics PowerPoint Lesson

This lesson builds forces from the ground up: what a force is, the three things a force can do, and how to sort every force into contact and non-contact families. It covers measuring in newtons with a newtonmeter, the difference between mass and weight with W = m x g, the four rules for drawing a proper force diagram, and how to calculate a resultant force and use it to predict motion. Friction and drag are taught as useful forces rather than nuisances, and a dedicated misconception slide fixes the mass-and-weight confusion before it sets. Two practical tasks are included: a properly controlled friction investigation with a newtonmeter, and a force-diagram detective task covering four real situations. It is a ready-to-teach PowerPoint scaffold for an hour-long lesson on forces and their effects. British spelling and UK National Curriculum KS3 Science throughout.