GEARS
A gear is a round wheel with little teeth around the edge. When the teeth of one gear push the teeth of another, they make each…
Simple Machines
LEVERS
A lever is a simple machine that uses a bar and a fixed point to help move a load. It has 3 parts: LOAD — What…
CRANKS
A crank is a simple machine that turns back-and-forth motion into circular motion, or circular motion into back-and-forth motion. A crank usually has a handle or…
PULLEYS
A pulley is a simple machine that uses a wheel and a rope, string, or belt to move things. A pulley can help us lift objects,…
CAMS
A cam is a rotating part that makes another part move in a repeated pattern. A cam can be round, oval, or have an uneven shape.…