Simple Machines

1. Mechanical Advantage

1.1. Number of the times that the machine increases an input force

1.2. Actual Mechanical advantage = output force/input force. Ideal mechanical advantage = input force/ output force

1.3. No units

1.4. Pushing a wheel barrow and pulling a wheel barrow

1.5. Mutiple forces

2. Incline Plains

2.1. A flat supporting surface tilted at an angle

2.2. A ramp and a slide

2.3. It makes work easier

3. Wedge

3.1. A piece of wood or metal with a thick edge tapering with a thin edge

3.2. A knife or an axe

4. Screw

4.1. A short metal pin.

4.2. Screw and corkscrew

5. 1st Class Levers

5.1. Lever in which the fulcrum is positioned between the load and effort

5.2. Scissors and a See Saw

5.3. Makes things easier to do

6. 2nd Class Levers

6.1. A lever in which the load lies between the fulcrum and the effort

6.2. Stapler and Wheel barrow

6.3. Make things easier to do

7. 3rd Class Levers

7.1. A lever in which the effort is placed between the fulcrum and the load

7.2. Tweezers and Staple remover

7.3. They make things easier to do

8. Work

8.1. The product of force and distance

8.2. Work=force X distance

8.3. Units=Joules

8.4. Weight lifting and suitcase being pulled

8.5. You use it in simple machines because the machines make work easier to do.

9. Power

9.1. Rate of doing work.

9.2. Power =work/time

9.3. Units= Watts

9.4. Shoveling snow and a snow blower

9.5. Making things easier to do

10. Wheel and Axel

10.1. A simple lifting machine consisting of a rope and a wheel

10.2. Ferris wheel and a door nob.

11. Pulley

11.1. A wheel with a groomed rim which a cord passes

11.2. A crane and an elevator

11.3. It makes things easier