![]() You can have any number of gears connected together and they canīe in different shapes and sizes. Running under the car that ultimately powers the wheels. That takes power from the engine) to the driveshaft In a bicycle, for example, it's gears (with the help of aĬhain) that take power from the pedals to the back wheel. Gears are used for transmitting power from one part of a machine That's simply because the pedal wheel and the back wheel are some distance apart and a chain is the easiest way to link them together. Wheel you pedal with those on the back wheel. Lubricated chain connects together the gears (known as sprockets) on the In a bicycle, the gears don't link by meshing together directly. So the teeth of one wheel lock into the teeth of another that stops them slipping, which means power is transmitted In a car or a motorcycle, the gears "mesh" An opened-up gearbox on show at Think Tank, the science museum in Birmingham, England. Or send the force of a machine off in another direction. They're a simple way to generate more speed or force Gears are helpful in machines of all kinds, not justĬars and cycles. Flick to a different gear and you can go incrediblyįast: you can magically make your wheels turn round much faster than Once you're back on the straight, it's aĭifferent story. Much impossible unless you use the right gear to Have you ever tried pedaling a bicycle up a really steep hill? It's pretty
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