Simple Machines Part 1

We are learning about simple machines.  A simple machine is a mechanical device that changes the direction or magnitude of a force. A few of the words we have learned are: force, lever, fulcrumpulley, and wedge. 

Force and Lever

Force is something that changes the motion of an object.

A lever is a stiff bar that rests on a support called a fulcrum which lifts or moves loads. A seesaw is a lever with a fulcrum.

Pulley

Pulleys change the direction of force. Flagpoles and elevators use pulleys.

Wedge

A wedge is a simple machine used to push two objects apart. Examples of the wedge include knives, chisels, and axes.