Effort, Energy, And Simple Aircraft

EFFORT, ENERGY, AND SIMPLE AIRCRAFT  
Energy is the ability to make things work. Energy can not be createdor destroyed, but can change from one form to another, such as kineticenergy and energy potential. The amount of energy equal to the magnitude of the change effort. Comparable amount of effort with the magnitude of the force and displacement. If the direction of the force equal to the displacement direction business is positive. Instead, the effort is negative if the directionopposite to the direction of force displacement.
Tools to facilitate the work is called a plane. The aircraft can not reduce the size of the business.
Speed ​​of an aircraft in work or work done per second is calledpower.
EFFORT, ENERGY, AND SIMPLE AIRCRAFT 
source; bse.com