Purpose and core concept Using colliding balls of the same size and different masses to verify the law of conservation of momentum. The apparatus is designed to demonstrate momentum transfer in controlled, headon collisions between equalsized balls of different masses. What the product comprises The experimenter is mainly composed of aluminum alloy rails, brackets, scale lines, and related components. It is equipped with a metal ball, a glass ball, a plastic ball (diameter: 16 mm), and a copper weight. Key benefits and value Enables clear visualization of momentum conservation and impulse in collisions. Supports practical, handson learning that reinforces theoretical concepts. Enhances students' observation skills, stimulates questions, and helps connect classroom content with real life. Practical features and specifications Material and construction: aluminum alloy rails, brackets, scale lines for precise measurement. Ball and weight assortment: metal ball, glass ball, plastic ball (16 mm diameter), copper weight. Educational focus: designed to study physics through kinetic and potential energy demonstrations. Suggested use scenarios Inclass demonstration of momentum conservation: students observe collisions between the metal, glass, and plastic balls to see how momentum is redistributed. Experimental investigations of mass effects: students adjust the copper weight to vary effective mass and observe changes in postcollision velocities, reinforcing the relationship between mass, velocity, and momentum. Linking theory to real life: use the apparatus to discuss practical examples of momentum transfer in everyday situations and connect observations to physics coursework and textbook concepts. Educational outcomes Encourages active inquiry and measurementbased reasoning. Provides a tangible way to study basic physics principles through handson experiments. Supports clear documentation and analysis of collision outcomes using the builtin scale lines and components.