simple Machines

1. screw

2. wedge

2.1. Wedge is chop,slice,cut.

3. lever

3.1. a lever is balancing on the fulcrum.there is a load(what you are trying to lift) and effort(you are the effort).

4. wheel and axle

4.1. there are two different tipe of wheel and axle, do you know???

4.1.1. one wheel and axle is a wheel sticked to the axle and the other one is the wheel not sticked to the axle.