# Exploring Simple Machines

## Simple Machines

A simple machine is one of the six basic types of machines of which all other machines are composed.

*Mechanical advantage is defined as the ratio (fraction) between the outside force and the input force. It also equals the ratio between the input distance and the output distance.

* Efficiency is defined as the ratio between the amount of energy delivered from the machine to the energy needed in operating the machine.

* Both of these terms are related to simple machines because they are both parts of how the machine can operate.

## Compound Machines

A compound machine can be best described as two or more simple machines operating together. Two examples of a compound machine would be scissors because it consists of a lever and wedge ,and a bicycle because it's made up of levers, wheel and axles, inclined planes, and pulleys and screws.

## STEM Activites

Wheel and Axle - Balloon Car http://www.sciencebuddies.org/science-fair-projects/Classroom_Activity_Educator_BalloonCar.shtml, I would like to this project to learn how a balloon would be able to power the car and how it would even move at all.

Pulley - Miniature Ski Lift http://www.sciencebuddies.org/science-fair-projects/project_ideas/Phys_p100.shtml#summary , I would like to build this because I want to see how well the "ski lift" will transport the small objects from the beginning to the end.

Lever - Creating an Actual Lever http://www.sciencebuddies.org/science-fair-projects/Classroom_Activity_Student_Levers.shtml, I would want to do this so when my group builds the lever we could see how much weight it could withstand before giving out.

Inclined Plane - Slinking Slinkies http://www.sciencebuddies.org/science-fair-projects/project_ideas/ApMech_p019.shtml#summary , I want to do this activity because I want to see how the position of the inclined plane affects how the slinky will walk.

Screw - It's All In The Wrist http://www.sciencebuddies.org/science-fair-projects/project_ideas/ApMech_p039.shtml , I want to do this experiment because I think it would be interesting to see how just by turning a Archimedes screw pump how the water will begin to transfer water from a low-lying location to a higher location.

Wedge - Soap Carving http://homeschoolden.com/2013/11/12/simple-machines-unit-wedge-hands-on-activities/ I want to do this project because I would like to see how a carving made out of soap would turn out.