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What is 1 + 3?
a bar that goes through the center of a wheel
a pulley that stays attached in one place
A push, pull or lift
the object that a lever rests on
a wheel with bumps around its edge
the force that pulls everything toward the earth.
a flat surface with one end higher than the other.
a stiff bar used to push,pull,or lift an object
a wheel that has a rope looped around it. The rope fits in a groove that runs around the edge of the wheel
a simple mahcine that looks like a nail with ridges on it.
a machine with few moving parts
two inclined planes put together. Nails and shovels are wedges
a round object that turns on an axle
using force to move an object from one place to another