Action and Reaction Concept

Demonstrations in Action and Reaction

Two gray Hanson hanging scales with white dial faces, connected at their top hooks by rope, with rope handles tied to the bottom hooks

Third Law Tug-of-War

Two volunteers pull on connected force meters (dairy scales) while seated on rolling platforms. The scales always read equal forces regardless of who pulls harder or who is heavier, directly …
PASCO fan cart with wooden propeller behind wire loop guard on dynamics track, with detachable black rectangular sail sitting on the track beside it
Safety

Fan Cart and Sail

Demonstrates Newton's Third Law and the distinction between internal and external forces. Without the sail, the fan pushes air backward and the cart accelerates forward. With the sail attached, all …
Orange painted metal cart with four silver wheels, two vertical pipes supporting an arched crossbar from which a heavy aluminum cylinder hangs by thin wires

Action-Reaction Cart

A heavy pendulum suspended on a wheeled cart demonstrates Newton's Third Law: push the cart and the pendulum swings opposite, or swing the pendulum and the cart rolls opposite. Makes …