Newton’s Third Law Demonstration: Action-Reaction Cart Experiment #3361835 (License: Personal Use)

This schematic shows a wheeled hollow cube equipped with a pipe nipple that ejects a stream of fluid (e.g., water or air) toward a vertical wooden board. The board is suspended by a cord, allowing it to move freely upon impact. As the fluid jet strikes the board, the reaction force propels the cart in the opposite direction, visually demonstrating Newton’s third law of motion.

Commonly used in educational physics labs or classroom demonstrations to illustrate conservation of momentum and Newton’s third law; ideal for students learning foundational mechanics concepts.