my results are that simple machines work by using force and some work.
Increasing the efficiency of a simple machine means that it requires less input work to produce the same output work. This results in less wasted energy and ultimately allows the machine to do more work with the same amount of input.
A simple machine that can do work with just one movement is a lever. Levers work by applying force to one end, which then results in a movement of the other end to perform work. Examples of levers include seesaws and crowbars.
the work a machine does is the work output what it takes to do the work is the work input
The work ouput of the second machine will usually be more than the work input of the first machine.
Input work is the work done on a machine, while output work is the work done by the machine. Efficiency of a simple machine is calculated as the ratio of output work to input work. The efficiency of a simple machine is high when the output work is close to the input work, indicating that the machine is converting most of the input work into useful output work.
Work
Scissors are a simple machine. A simple machine makes work easier to do. (not hard work) What type of simple machine are they? They are a lever. Levers have fulcrums or pivot points. The pivot point of the scissors are the crossing section.
The mechanical advantage of a compound machine is the multiple of the separate mechanical advantages of each simple machine. The efficiency of the compound machine is also the multiple of the separate efficiencies of each simple machine. So the work in to the first machine multiplied by all of the simple machine efficiencies gives you the work out of the last machine
WORK!
Doing work.
When the input work on a simple machine equals the work output, the machine is said to be 100% efficient. This means that all the input work has been converted into useful output work, with no energy lost due to friction or other inefficiencies in the machine.
When simple machines work together, that forms a compound machine.