History Of Simple Machines

  • Lever
    260

    Lever

  • Screw
    400

    Screw

  • Wedge
    Jan 1, 1000

    Wedge

  • Pulley
    Jan 1, 1500

    Pulley

  • Inclined Plane

    Inclined Plane

  • Wheel and Axle

    Wheel and Axle