2. http://www.explainthatstuff. http://www.explainthatstuff A tool that magnifes effort

3.  www.sciencebuddies www.sciencebuddies  A lever has many class. Class 1 2 and 3

4.  a inclined plane is like a ramp

5.  A inclined plane wrapped around a pole

6.  Any shape that is triangular and has a blade.

7.  Wheel: Round shape connected to an axle that magnifies effort.

8.  A simple machine that uses a rope or sting to lift a load.

9.  A gear is a wheel with teeth

10.  Effort needed to move a certain distance.

11.  Mass* acceleration effort force

12.  the number of times a machine multiples your effort

13.  A device that help people