pulley
The chain is wrapped around a cogwheel, which could be described as a pulley.
The bicycle is not a simple machine, there are too many interacting moving parts.
pulley
pulley
lever at crank, connected by chain to lever at rear wheel
A bicycle is an example of a complex machine.
gears and wheel and axle
A common example of a pulley is a flagpole pulley system, where a rope is used to raise and lower a flag. The pulley helps to reduce the amount of force required to lift the flag by distributing the load.
yes
No it is not. A belt, for example, goes around a pulley.
An example of a fixed pulley is a flagpole. The pulley is attached to the top of the pole, and the rope passes through it to help raise and lower the flag. The pulley remains stationary as the flag is moved up and down by pulling on the rope.