BY Patrick Durkin Stephen Riley, and Becca SIMPLE MACHINES BY Patrick Durkin Stephen Riley, and Becca

Table Of Contents WEDGES INCLINE PLAINS WHEEL and AXLE PULLEY SYSTEM SCREWS LEVERS COMPOUND MACHINES

WEDGES Wedges are used to separate two objects apart, or separate a section of an object. For example, a wedge separates a log into two pieces. Also, an axe is a wedge. The blade of the axe is the wedge. The origin of the wedge is un-known because it was being used in the stone ages (cave-men). Movie clip Back to TOC

Inclined Plaines (don’t pay attention to the writing) Back to TOC

Inclined Plaines An inclined plane is a ramp basically. It curves up-right, or slants down. An incline plane helps with various jobs like movers. They slide the object down the ramp from the truck. Screws are also inclined planes because it separates the ground and/or surface. Miners used inclined planes to pull the wagons across rough grounds. Back to TOC

Wheel and Axle & Pulley System By Stephen Riley Back to TOC

Pulley System A pulley is a wheel with a groove between two flanges around it’s circumference Pulleys are used to change the direction of an applied force, transit rotational motion, or realize a mechanical advantage in either a linear or rotation system of motion. The two different types of pulleys are movable and fixed… Fixed: Pulleys that are “fixed” or anchored into place. Movables: Pulleys that are free to move in space. One example of a pulley system is an elevator. Back to TOC

Wheel and Axle A Wheel and Axle is a lever that Rotates in a circle around a center point. The larger wheel (outside) rotates around the smaller wheel. One of the most common wheel and Axles is the wheel of a truck. Some examples of a wheel and axle are screwdrivers, doorknobs, windmills, and gears. Back to TOC

Screws and Lever By Becca Kolenkiewicz Back to TOC

Levers a lever (from French lever, "to raise", c.f. a levant) is a rigid object that is used with an appropriate fulcrum or pivot point to multiply the mechanical force that can be applied to another object. This is also termed mechanical advantage, and is one example of the principle of moments. A lever is one of the six simple machines. Back to TOC

Screw A screw is a cylinder with an inclined plane wrapped around it. There is a special type of screw called the Archimedes Screw. The screw was invented by Archimedes There are many types of different types of screws in the world. Back to TOC

Compound Machines A compound machine would be at least two of the simple machines combined together to form one machine that works just as well. An example of a compound machine would be an axe, combining a lever and a wedge. Back to TOC

Credits Master slide show: Patrick Durkin Screws and Levers: Becca Wheel and Axel, and Pulleys: Stephen Special thanks to Patrick Durkin, but we’re but we’re not sure why yet. Back to TOC

Bibliography http://images.google.com/imgres?imgurl=http://www.mertons.com/img_content/bronze-screws-2.jpg&imgrefurl=http://www.mertons.com/Fastenings/wood_screws.html&h=650&w=470&sz=397&hl=en&start=8&um=1&tbnid=8LYc5IhzezQeFM:&tbnh=137&tbnw=99&prev=/images%3Fq%3Dscrews%26svnum%3D10%26um%3D1%26hl%3Den%26sa%3DN http://middle.capemayschools.com/mt2/young/young-webs-simple%20machines/index_files/Page353.htm http://www.northstar.k12.ak.us/schools/upk/projectsfolder/gold/facts/machines/machines.html http://www.youtube.com/results?search_query=wedges&search=Search