Power

Power is the rate of doing work, or work done per second. Mathematically formulated :
P = W / t
Description:
P = power units joules / second or watts
w = business units joules.
t = time second unit

Incline

Another simple type of aircraft is the inclined plane. By using the inclined plane we can raise a heavy load into the truck was easy. In addition to the image field is tilted. From the figure shows that l = length of inclined plane, w = weight, F = force (power) and h = height of the incline.
In a state of balance on an inclined plane applies:
w.h = F.s

Free Pulley

Free pulley can be moved freely at the time used, consider drawing the pulley on the side. In a state of balance on a pulley free to apply: W. Lb = F. lk

If you look at the picture, then at the free pulley, big arm power equal to twice the load arm. So that the mechanical advantage on free pulley size two (2) times, namely:
Km = W / F = 2 or Km = Lk / Lb = 2

Pulley

Pulley is a wheel-shaped and grooved edges and spins on its axis. Based on the placement, the pulley is divided into three types: fixed pulley, the pulley is free (pulley moves), the pulley system.
- Fixed pulley
This pulley in place. Adapaun fixed pulley sections are as follows:
W = weight
F = the power or force
Point A = point load
Point B = fulcrum
Point C = point of power
Distance AB = arm load, Lb = radius of pulley

Distance BC = arm power, Lk = radius of pulley.
On balance, apply:
W x Lb = F x Lk

Notice in the picture, that the pulley fixed amount of the load arm with the arm power is the same, then the mechanical advantage (km) = 1.

So it applies:
Km = W / F = 1 or Km = Lk / Lb = 1

Lever

The lever is a simple aircraft which can be either the board or the field, can be made ​​of wood, iron or the other.

Lever has the advantage of the so-called mechanical advantage. Mechanical advantage is the ratio between the load to the force applied or the ratio between the power arm to load arm. Mathematically formulated as follows:

Km = W / F or Km = Lk / Lb

Several tools based on the lever principle works as follows:

a. The fulcrum is located between the loading point and power points, including: pliers, scales, seesaw, scissors.

b. Load point is located between the fulcrum and the point of power, among others: a corkscrew, push carts, hazelnut solver.
c. Power point located between the fulcrum and the load point, among others: tweezers, staples, clamps bread.

Understanding Aircraft.

In human life can not be separated from activities do work. For ease of doing business will require a tool. Tools that can facilitate the conduct of business is called a plane.

The plane is just easier to do business, not reduce the effort must be made. Included is a simple plane: a lever or levers, pulleys, inclined plane.