A simulation tool for exploring pulse dynamics in connected strings with different densities

Abstract This paper presents an interactive simulation tool designed to investigate the dynamics of a Gaussian pulse propagating along two connected strings with different linear densities. The simulation focuses on cases where the string ends are either fixed or free and allows for a detailed examination of the time-dependent behaviour of energy, momentum, and forces during wave transmission and reflection at boundaries. By enabling users to manipulate physical parameters and observe real-time results, the tool provides a pedagogically useful platform for studying wave mechanics. This approach supports physics education by helping students visualise and better understand conservation laws and wave behaviour in composite media—topics often underemphasised in introductory physics courses.