1.1. activity involving mental or physical effort done in order to achieve a purpose or result.
1.2. Work = Force • Displacement • Cosine(theta) W = F • d
1.3. joule
1.4. they relate to work because they are simple
2. 1st class lever
2.1. Fulcrum in the middle: the effort is applied on one side of the fulcrum and the resistance on the other side,
2.2. siccors,
3. incline planes
3.1. is a flat supporting surface tilted at an angle, with one end higher than the other,
4. wheel and axel
4.1. e wheel and axle is generally considered to be a wheel attached to an axle so that these two parts rotate together in which a force is transferred from one to the other. In this configuration a hinge, or bearing, supports the rotation of the axle.
5. pulley
5.1. is a wheel on an axle or shaft that is designed to support movement and change of direction of a taut cable or belt along its circumference.[1] Pulleys are used in a variety of ways to lift loads, apply forces, and to transmit power. In nautical contexts, the assembly of wheel, axle, and supporting shell is referred to as a "block."
6. power
6.1. the ability to do something or act in a particular way, especially as a faculty or quality.
6.2. watts
7. mechinical advanatge
7.1. the ratio of the force produced by a machine to the force applied to it, used in assessing the performance of a machine.
7.2. help with heavy stuff with pulley
7.3. pulley,wedge
7.4. no units
8. 2nd class
8.1. : Resistance in the middle: the effort is applied on one side of the resistance and the fulcrum is located on the other side,
9. 3rd class lever
9.1. Effort in the middle: the resistance is on one side of the effort and the fulcrum is located on the other side
10. wedge
10.1. in politics, a divisive issue used to split the support base of an opposing political group
11. screw
11.1. is a type of fastener, typically made of metal, and characterized by a helical ridge, known as a male thread (external thread) or just thread, wrapped around a cylinder.
