6 Simple Machines PDF
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Summary
This document provides a summary of six simple machines. It covers the description, key ideas, and examples of each machine. These include levers, wheel and axles, pulleys, inclined planes, wedges, and screws. The document also discusses mechanical advantage.
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6 Simple Machines Simple Machines Description Key Ideas 3 Examples Lever rigid bar the rests apply a force to one see saw, crow bar, on a pivot point end of a lever, scissors called the fulcrum crea...
6 Simple Machines Simple Machines Description Key Ideas 3 Examples Lever rigid bar the rests apply a force to one see saw, crow bar, on a pivot point end of a lever, scissors called the fulcrum creates at turning force at the fulcrum Wheel and Axle the wheel that The wheel and axle door knob, bicycle rotates around a consist of circular wheel central rod. object when force is applied to the wheel it causes the wheel to rotate Pulley A pulley is a wheel By pulling down on Lift hills with a grove that one side of the rope holds a rope of the object that is cable attached on the other end is raised Inclined Plane Is a flat surface that It allows objects to Ramps, stairs is positioned at an me moved form a angle lower to higher level Wedge Is a sharp, It has a thick end knives, axes, and triangular object called the base and doorstops. that is used to split a pointed end or separate objects called the tip Screw A screw is an used to hold things lightbulbs, jars, inclined plane together or to lift and drills. wrapped around a heavy loads cylinder or cone-shaped object. Mechanical Advantage When a machine turns a small input force into a larger output force we say that the machine gives us a mechanical advantage. output force input force MECHANICAL ADVANTAGE = EXAMPLE - it requires 1 N of force to produce 25 times greater force when pulling a nail using a hammer Mechanical Advantage = 25 CLASS 1 LEVERS Effort father that load=easier Load arm shorter=easier If load to fulcrum=easier CLASS 2 LEVERS EXAMPLES Load is between the fulcrum and effort Load closer to fulcrum= easier If you move effort from fulcrum = easier Effort arm longer= easier CLASS 3 LEVERS EXAMPLES Effort closer to the fulcrum effort arm (shorter)= harder First class lever - Fulcrum is in the middle. Second class lever - Load is in the middle. Third class lever - Effort is in the middle.
