INCLINED PLANE, WHEEL AND AXLE, PULLEY, ROPE, GROOVE, PARTS OF THE PULLEY - ROPE, AXLE, WHEEL, PARTS OF THE LEVER - PIVOT POINT, LOAD, EFFORT, ARCHIMEDES' SCREW (It is a giant screw for pumping water from a river to irrigate the nearby land), PEDAL BICYCLE (Invented by Kirkpatrick Macmillan), WINDSCREEN WIPER (Invented by Mary Anderson), PERSONAL COMPUTER (Invented by Steve Wozniak), WHO INVENTED THE FIRST POWERED AIRPLANE? - The Wright Brothers,

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