Free-Body Diagram Builder and Checker
Choose a realistic classroom situation, add the real forces, position each vector directly, and check a compact free-body diagram.
Interactive tools
6 physics tools are available.
Choose a realistic classroom situation, add the real forces, position each vector directly, and check a compact free-body diagram.
Explore what slope, signed area, intercepts, and graph shape mean for common physics quantities, with explicit units and assumptions.
Build a visual Newton's Third Law pair with one equal-size force arrow on each object, then contrast it with balanced forces on one object.
Compare distance, displacement, average speed, and average velocity while moving along straight, return, and circular trips.
Generate and solve 328 audited classroom problems across 22 model families spanning every unit of AP Physics 1, AP Physics 2, both AP Physics C courses, and NY Regents Physics.
Vary initial velocity and constant acceleration to see when an object speeds up, slows down, stops, or reverses direction.