Two (2) standing platforms each about 11 inches by 15 inches (I cut mine from outdoor stair tread)

Archimedes said, “Give me a place to stand and with a lever I will move the whole world.” The lever is one of the six classic simple machines. A simple machine is a mechanical device that changes a force’s direction or magnitude. The other five simple machines are the wheel and axle, the pulley, the […]