Machine

engineering · how things work · energy · technology

Power turns into work. Machines take energy from somewhere (like electricity, wind, or muscle) and transform it into movement and force to accomplish a task. A bicycle is a simple machine that changes your leg power into wheel spinning.

Mechanisms shape the action. Inside every machine are interconnected parts like gears, levers, and pulleys that take the raw power you give it and steer it exactly where you want it to go. These parts are like the machine's internal instructions.

Natural and artificial. Machines aren't just human inventions. Your cells contain molecular machines made of proteins that do incredible jobs, like building new proteins or moving things around inside the cell.

Smart machines learn. Modern machines can include computers and sensors that watch what's happening and adjust the movement automatically, kind of like a machine that thinks for itself.

Many power sources work. Machines can run on almost anything: human muscles, animal strength, wind, flowing water, burning fuel, electricity, or even heat from the sun.