This one of the simple machines is made by using a wheel & a rope
Attach a hook to the cord, and 
now you can use the wheel's rotation to raise and lower objects, making work... [DOC] [TLE] SOL 4.2 Simple Machines - Teacher key - SolPass [PAR] Examples: Screw, Wheel and Axle, Wedge, Pulley, Inclined Plane, Lever ...