Question

The purpose of any simple machine is to allow a job to be done with less force than would normally be needed. However, when a string of simple machines are added together to accomplish a task, the overall efficiency of the machine decreases. Write a brief essay explaining why the efficiency of a complex machine decreases as more simple machines are used. Be sure to include a discussion on the Conservation of Energy in your explanation.

Answer 1

The essay will highlight the fact that for every simple machine, there is always friction involved. As per the law of conservation of energy, the energy input to a system is equivalent to the energy output. Some of this output is in the form of friction, which is not useful. As the moving parts in a machine increase, it becomes more complex and more friction is generated between its parts. Therefore, a complex machine ends up being less efficient.