Propulsion is the study and technology of creating the force or power needed to move an object, usually a vehicle. It involves the design and development of propulsion systems, which can be classified into different types such as chemical propulsion, electric propulsion, and nuclear propulsion. Propulsion plays a crucial role in various fields such as aerospace, marine transportation, and automotive industries, enabling vehicles to move efficiently and overcome the forces of inertia and resistance. Researchers in the field of propulsion focus on improving the performance, efficiency, and sustainability of propulsion systems through advanced technologies, materials, and design concepts.