Simple Machines

1. 1st class lever

1.1. lever in which the fulcrum is positioned between the load and the effort.

1.2. ex. A crowbar

1.3. It's used to pry something open

2. 2 class levers

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

2.2. Ex. a wheel barrow

2.3. It's used to lift something and walk it over

3. 3rd class levers

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

3.2. Ex. Someone using a broom

3.3. It's used to move something to somewhere

4. Incline Planes

4.1. a plane inclined at an angle to the horizonta

4.2. Ex. Someone walking up a inclined plane to get somewhere while using less power

4.3. It's used instead of stairs to lift something and walk it up

5. Wedge

5.1. a piece of wood, metal, or some other material having one thick end and tapering to a thin edge, that is driven between two objects or parts of an object to secure or separate them.

5.2. Ex. Walking up a wedge to use less power while lifting a box

5.3. It's used to hold something open

6. Work

6.1. activity involving mental or physical effort done in order to achieve a purpose or result.

6.2. Ex. 42 Joules

6.3. They relate to simple machines by showing how effective of how much they force it takes to move an object a certain distance

6.4. Formula: w=fd

7. Power

7.1. the ability to do something or act in a particular way, especially as a faculty or quality.

7.2. Ex. 42 watts

7.3. They show how much power using a simple machine produces

7.4. formula= p=w/t

8. Mechanical Advantage

8.1. the ratio of the force produced by a machine to the force applied to it, used in assessing the performance of a machine.

8.2. Ex. 32

8.3. They show how effective simple machines are

8.4. Formula: output force/ input force

9. Screw

9.1. Image result for screw simple machine definition. An inclined plane wrapped around a shaft or cylinder.

9.2. Ex. A screwdriver screwing a screw

9.3. They are useful by tightening and looseniing something by just using a screwdriver and using less force to tighten something then when what it takes to pry it apart

10. Wheel and axle

10.1. a simple lifting machine consisting of a rope that unwinds from a wheel onto a cylindrical drum or shaft joined to the wheel to provide mechanical advantage.

10.2. Ex. Pulling a rope to move a desk

10.3. It's used by rolling something to somewhere

11. Pulley

11.1. a wheel with a grooved rim around which a cord passes. It acts to change the direction of a force applied to the cord and is chiefly used (typically in combination) to raise heavy weights.

11.2. Ex. A pulling a pulley to move rocks

11.3. They are used by pulling a rope to pull an object up