Simple machines lets you trade force for distance, or the other way around. Or they change the direction of a force.
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
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.
You are using a wheel and axle simple machine when you twist a doorknob. The wheel (the doorknob) rotates on the axle (the spindle), allowing you to easily open or close the door.
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).
the work a machine does is the work output what it takes to do the work is the work input
A compound machine combines two or more simple machines to perform work more efficiently than a single simple machine. By leveraging the advantages of different simple machines working together, a compound machine can multiply the input force or distance, making it easier to accomplish tasks that would be challenging using just one simple machine.