Simple machines lets you trade force for distance, or the other way around. Or they change the direction of a force.
The purpose using a simple machine is because it helps you do things your to lazy to do it yourself.
In essence it is a pulley in which the chain and the wheel cannot slip with regard to each other.
frights
A lever
frights
a hammer
The Mechanical Advantage is the ratio of the force needed to lift an object using the simple machine divided by the weight of the object
inclined plane
my results are that simple machines work by using force and some work.
A complex machine is a machine using more than one simple machine for its operation. A bicycle is a complex machine, using a lever for steering (handlebars), wheel and axle, inclined plane (the threads on bolts), and a pulley (chain on sprockets).
An airplane is not a simple machine. A lever is a simple machine. A wheel is a simple machine. Any machine that can be described by a mathematical formula is a simple machine.
A Lever