Key benefits Demonstrates the conservation of momentum with a clear, hands-on experiment: colliding spheres of the same diameter but different masses make the momentum law visible and measurable. Improves observation and experimental skills: precise scale lines and stable mounts let students record and compare pre- and post-collision motion. Connects textbook theory to real situations: suitable for instructor-led demonstrations, student experiments, and small-group research tasks. What the set includes and how it works Experiment principle: uses collisions between spheres that have the same size but different masses to verify the law of conservation of momentum. Main structure: rails, holders, and scale lines made from aluminum alloy for rigidity and long-term use. Included items: one metal ball, one glass ball, one plastic ball (diameter: 16 mm), and one copper weight. These allow combinations of identical-size collisions with differing masses. Measurement aids: the aluminum rails and scale lines enable repeatable setup and straightforward comparisons of velocities before and after collisions. Key attributes Function: Designed specifically for momentum and collision demonstrations; also supports related kinematics observations. Materials: Durable aluminum alloy rails and supports; balls of metal, glass, and plastic; copper weight for changing mass conditions. Size/specification: Balls provided are 16 mm diameter; overall components sized for table-top physics demonstrations. Performance: Stable mounting and clear scale markings provide reproducible results for classroom and lab use. Typical applications High school physics lab: Teacher demonstration or student lab to verify conservation of momentum and practice data recording. Introductory university mechanics: Small-group experiments for verifying collision outcomes and comparing masses and velocities. Science clubs or project work: Hands-on investigations that develop experimental technique, observation, and hypothesis testing. Practical advantages for educators and students Easy to set up and use during a single lesson period. Enables direct comparison of different material properties and mass distributions while keeping diameter constant. Encourages inquiry, observation, and linking theoretical principles to real experiments without complex equipment.