Best Ever Q&A Space Our World Nature History Science & Technology Human Body Senses & Organs Science of Life Chemicals & Matter Atoms & Molecules Materials Forces & Energy Sound Electricity & Magnetism Heat & Light Everyday Science Industry Transportation Computers Machines Ships Undersea Exploration Land Travel Cars Flight Structures Buildings Farming	Forces & Energy How does a turbine work? What is friction? What is a force? How does a space rocket work? What forces act on an aeroplane in flight? How is energy released inside a nuclear reactor? What is an Archimedes' Screw used for? What is gravity?   Previous: Back to Forces & Energy Book: Best Ever Q&A Section: Science & Technology Chapter: Forces & Energy