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Simple Machines and Their Uses
Pulley: A pulley is designed in such a way that it reduces the amount of force which would have been otherwise required to cover a huge distance. In modern days a computer-controlled pulley is even used in the working of, 3-Dimensional printers to print designs. Example: Garage and store doors, Blinds.
Lever: A lever has a simple design containing a long part or a beam, and a pivot. The principle of a lever is to double the length that was supposed to be travelled earlier while ultimately decreasing the force by almost half thus reducing the efforts. Example: See-saw, Hammer.
Wedge: A wedge basically alters the direction of the input force and is used mainly to split up or divide a load into parts. A wedge that is long and thin has an advantage over a wedge that is comparatively smaller and wider. Example: Axe, Scissors.
Screw: Screws are widely used in devices where we need to apply a force which is higher than the actual force that would have been required to twirl the screw. Sometimes a long handle like attachment can also be used to twirl the screw in order to get a mechanical advantage. Example: Light bulb, jar lid.
Wheel and Axle: As we all must know; the wheel is considered to be one of the greatest inventions by mankind. Due to its round shape a wheel makes carrying load over a distance easier by greatly lowering the frictional force encountered by it. Transporting loads over a distance is much easier with the help of wheels. Example: Cycle, Office chairs.
Inclined Plane: A completely flat surface that is set at a particular angle to serve a particular purpose is an inclined plane. It was designed so that heavy loads could be lifted easily that would otherwise have been difficult to lift straight up. The higher angle of inclination of the ramp the easier it is for the object to be lifted. Example: Park slides, Wheelchair lamps.
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