Simple Machines

1. Mechanical Advantage

1.1. Definition: is a measure of the force amplification achieved by using a tool, mechanical device or machine system.

1.2. How does this relate: mechanical advantage helps us find the answres

1.3. Ex: a broom

1.4. Ex: a pencial

1.5. Formula & Units: MA= fb/fa

2. 1st Class Levers

2.1. Definiton: A lever in which the fulcrum is positioned between the load and the effort

2.2. How does this relate: Has a fulcrum a load and an applied force.

2.3. Ex: Scissors

2.4. Ex: tongs

2.5. Formula & Units: IMA= D1/D2

3. 2nd Class Levers

3.1. Definitions: A lever in which the load lies between the fulcrum and the effort

3.2. How does this relate: This relates because a lever is a simple machine that is made up of a board or bar that rests on an object.

3.3. Ex: wheel barrow

3.4. Ex: nut cracker

3.5. Formula & Units: D1= Effort/Arm

4. 3rd Class Levers

4.1. Definition: A lever in which the effort is placed between the fulcrum and the load.

4.2. How does this relate: this lever levels out something

4.3. Ex: baseball bat

4.4. Ex: some sort of ramp

4.5. Formula & Units: load/effort

5. Wedge

5.1. Definition: a piece of wood or metal of some-sort used to wedge something open.

5.2. How does this relate: this is a everyday simple machine used in schools

5.3. Ex: doorstop

5.4. Ex: block

6. Pulley

6.1. Definition: a wheel with a grooved rim around which a cord passes.

6.2. How does this relate: this lifts something heavy up without using electricity.

6.3. Ex: Crane

6.4. Ex: A water well

7. Work

7.1. Definition: Using a force to move an object a certain Distance.

7.2. How does this relate: Work helps simple machines make the job easier

7.3. Ex: a box pushed up against a wall

7.4. Ex: Picking something up

7.5. Formula & Units: W=fd and Joules for the units.

8. Power

8.1. Definition: The ability to do something or act a certain way.

8.2. How does this relate: Power makes Simple machines do their job by acting upon it.

8.3. Ex: Functioning a gasoline driven saw

8.4. Ex: The strenghth needed to run 10 miles.

8.5. Formula & Units:

9. Inclined Planes

9.1. Definition: a plane that is at an horizontal angle.

9.2. How does this relate: this helps us use ramps

9.3. Ex: Hammer

9.4. Ex: Wedge

10. Screw

10.1. Definition: A small rotational force going into an object.

10.2. How does this relate: this is another simple machine to use without electricity

10.3. Ex: wooden handle

10.4. Ex: cork screw

11. Wheel & Axle

11.1. Definiton: a simple lifting machine consisting of a rope that unwinds from a wheel onto a cylinder drum

11.2. How does this relate: Is a simple machine

11.3. Ex: Pencil sharpener

11.4. Ex: Tire on a car