what is the earliest recorded uses of somple machines
A simple machine.
Leverage.
Doing work.
they are very simple and their is like so many things that fit in your home.
A Ladder.
No, simple machine. It uses the spinning shaft to revolve a gear which powers a generator. Very simple.
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.
When a human uses a complex machine it helps him or her.
An electric motor is not a simple machine, because it uses electric energy, which is not mechanical energy, which powers simple machines.
A simple machine is a machine which does not use a motor and does not consist of more than one simple machine. There are six types of simple machines. Wheel and axle, pulley, inclined plane, lever, screw, and wedge. A complex machine uses a motor, and a compound is made up of one or more simple machines.
A cookie jar uses a screw.
An hydraulic systems uses are to multiply the "effort force" or the force that person is applying to the simple machine