Campbell lives homework-Bike

The bike is a compound machine made by 3 simple machines called
pully,lever and wheel and axle.
The wheel and axle helps the wheel by the wheel rolling around the axle.
The pully helps by letting the chain go round it and then it gets conected to the axle witch makes the wheel rotate.
The lever is the handel bars they are really helpful because if they weren't there how could you
steer.
BY CAMPBELL LIVE