There are six types of simple machines: lever, wheel and axle, inclined plane, wedge, screw, and pulley. The mechanical advantage of each machine is determined by various factors like the position of the fulcrum on a lever, the ratio of wheel to axle radii, the length and height of an inclined plane, and the number of turns in a screw or ropes in a pulley system. A compound machine combines two or more simple machines to create more complex machines.

1. 14.4 Simple Machines What are the Six types of simple Machines? What determines the mechanical advantage of the six types of simple machines? http://www.nvsd44.bc.ca/sites/ReportsViewOnePopM.asp?RID=3812 http://www.uark.edu/depts/aeedhp/agscience/simpmach.htm Compound Machine Simple Machines

5. Fulcrum is between EF (effort) and RF (load) Effort moves farther than Resistance. Multiplies EF and changes its direction

7. RF (load) is between fulcrum and EF Effort moves farther than Resistance. Multiplies EF, but does not change its direction

9. EF is between fulcrum and RF (load) Does not multiply force Resistance moves farther than Effort. Multiplies the distance the effort force travels

14. MA of an screw can be calculated by dividing the number of turns per inch.