Simple Machines
Six simple tools that make hard jobs easier.
1
2
3
4
5
6
- Lever A bar that tips on a point. A seesaw lifts your friend when you push down.
- Wheel and axle A wheel on a rod. Wagons and cars roll heavy loads along.
- Pulley A rope over a wheel. It hoists the flag up the flagpole.
- Inclined plane A ramp. Walking up a slope is easier than climbing straight up.
- Wedge Splits things apart. An axe is one, and so are your front teeth!
- Screw A ramp wrapped around a post. It holds things together tight.
Did you know? Big machines are really teams of simple ones. A digger uses levers, wheels, and ramps all working together.
