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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