5.4 Vectors and the Third Law

Action and Reaction

Question posed to the students about a horse pulling a cart. Duration: 1:28.

Force Vector Diagrams

Paul extends Jim Court diagrams, identifying forces on a suspended, then falling ball.

Nellie's Ropes

Tensions via Nellie hanging by non-vertical ropes.

Force Vectors on an Incline

Paul analyzes forces acting on a block on an inclined plane, leading to forces on a block sliding on a curved surface. Duration: 4:14