If you want to ride after dark in a legal manner you need:
- a white reflector facing front
- yellow/orange reflectors facing sideways
- and a red reflector facing rear
Depending on location, you may also be required to use lights, usually white forward and red backwards.
Reflectors on a bicycle are used to provide for rider safety. People who ride bicycles near automobiles use reflectors in a similar manner to headlights on a passenger vehicle. Different jurisdictions have differing requirements for reflectors on bicycles.
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pulley
A bicycle wheel is considered a wheel and axle simple machine. When the wheel turns, it enables movement with reduced friction and effort. The axle acts as a fulcrum for the wheel to rotate around.
a mechanical machine
the handlebars are a first class lever. the fulcrum (the balance point) is in the middle.
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.
A pulley isn't a kind of simple machine, it is a simple machine
pulley
A train is not a simple machine.
IT's NOT A SIMPLE MACHINE!
its not a simple machine
It is a simple lever.
Rope is not a simple machine on its own, it's a simple machine on a wheel and axle, then it's a pulley.