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Machines

By Carly Carlson. Machines. Simple And Complex Machines. Simple machine- A machine that changes the amount of force put in to motion, normally making a job easier There are 6 simple machines: lever, pulley, wheel and axle, inclined plane, screw, and wedge.

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Machines

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  1. By Carly Carlson Machines

  2. Simple And Complex Machines • Simple machine- A machine that changes the amount of force put in to motion, normally making a job easier • There are 6 simple machines: lever, pulley, wheel and axle, inclined plane, screw, and wedge. • A complex machine is made out of 2 or more simple machines (ex. Bicycle or an axe)

  3. Lever • A lever is a simple machine that helps to lift weights. • An example of a lever is a hammer when pulling out a screw, a can opener, fishing rod, etc.. • To calculate the Mechanical advantage you divide the effort arm by the resistance arm

  4. Pulley • Pulleys are used to reduce the amount of force needed to lift a load, uses a groove and a rope. • Pulleys are used on ships to lift and lower a sail. • The mechanical advantage of a pulley is found by dividing the output force by the input force

  5. Wheel and axle • A wheel and axle is a lever that rotates around the fulcrum, the larger wheel rotates around the smaller wheel (axle) • An example of a wheel and axle is a Ferris wheel. • The mechanical advantage is found by dividing the radius of the wheel by the radius of the axle.

  6. Inclined Plane • An inclined planes is a flat, slanted surface used to raise an object • A commonly used example is a ramp used to lift heavy objects into trucks. • To find the mechanical advantage you divide the length by the height

  7. Screw • A screw is a shaft with a groove or thread formed around the surface. • The more threading on the surface the greater the mechanical advantage. • Screws can raise weights, or press and fasten objects. • Ex: Archimedes water pump, or just a plain screw

  8. Wedge • A wedge is shaped like an inclined plane, and is normally used to separate or hold. • Ex: you can take a strong wedge and slam it into a log and break the wood. • Another example is a shovel or a knife splitting something open. • The mechanical advantage is found by dividing the length of the slope by the thickness at the big end.

  9. Carly Carlson1st periodExtra credit project 5/22/10

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