Simple Machines
by Emma Carranza
1. Work
1.1. The scientific definition of work is: using a force to move an object a distance.
1.2. force being applied to an object.
1.3. Joules
1.4. W = F*D
2. Power
2.1. Power is the rate at which work is done or energy converted.
2.2. Watts
2.3. P = W/T
3. Mechanical Advantage
3.1. the ratio of the force produced by a machine to the force applied to it, used in assessing the performance of a machine
3.2. broom
3.3. no unit
3.4. MA*F
3.5. Its a simple machine because it holds a weight the way a machine wouldn't
3.6. Input distance/ output distance
4. 1st class levers
4.1. fulcrum placed between the load and the effort, as in the seesaw, crowbar, and balance scale.
4.2. seesaws
4.3. A simple machine because it is a work that can be used without no machine
5. 2nd class levers
5.1. Second-class levers have the load between the effort and the fulcrum
5.2. a wheelbarrow
5.3. Its a simple machine because it holds the effort that a real machine would.
6. 3rd class levers
6.1. the effort placed between the load and the fulcrum.
6.2. tweezers, scissors, a staple remover
6.3. A simple machine because you could use them with just your bare hands rather than a real machine.
7. Incline Planes
7.1. a flat supporting surface tilted at an angle, with one end higher than the other, used as an aid for raising or lowering a load.
7.2. A ramp
7.3. It is a simple machine because it takes work
8. Wedge
8.1. a piece of hard material with two principal faces meeting in a sharply acute angle, for raising, holding, or splitting objects by applying a pounding or driving force, as from a hammer
8.2. an axe
8.3. it relates to it because it is a handy type of work and uses no machine
9. Screw
9.1. a simple machine of the inclined plane type consisting of a spirally grooved solid cylinder and a correspondingly grooved hollow cylinder into which it fits
9.1.1. A screw