A pulley is a simple machine that has a grooved wheel that holds a rope or a cable. This is used to lift heavy loads. It is also known as sheave or drum.
A pulley
A pulley isn't a kind of simple machine, it is a simple machine
That would most likely be a pulley. A pulley is essentially a wheel on an axle that usually has a groove in the middle of its circumference that holds a rope, cable, belt, or chain. Pulleys are used to transmit motion rotationally and apply force in the direction of said motion. Two or more pulleys makes a tackle. Hope this is what you were looking for.
Not the whole part of the bike but the pedals are levers a kind of simple machine it uses the levers to apply force to the sprocket sprocket is a wheel and axle ,another simple machine,that uses gears to move the chain.
That isn't a simple machine, it is a complex machine, made up of other simple machines.
pulley
a pulley
A bicycle is an example of a compound machine. It consists of several simple machines like wheels and axles, pedals and levers, gears, and a chain. When combined, these simple machines work together to make the overall task of transportation more efficient.
A bicycle contains several simple machines, including levers, pulleys, and wheels. The pedals act as levers, allowing the rider to apply force more effectively. The wheels function as circular levers, enabling the bike to roll. Additionally, the chain and gears can be considered a type of pulley system, helping to transfer power from the pedals to the wheels for improved efficiency.
The chain is wrapped around a cogwheel, which could be described as a pulley.
In essence it is a pulley in which the chain and the wheel cannot slip with regard to each other.
An example of simple gears is the chain, chain-wheel and free-wheel sprocket as used on a single geared bicycle. More complicated gearing is the modern bicycle's derailleur system of multiply chain-wheels, a cluster of sprockets, a chain, and gear changer mechanism.