رد: The 4th day of the English competition
 

أم سلطآن آلشمري
غروب أبهآ
سنعوره

:verycute:

رد: The 4th day of the English competition
 

خرج 50 منافس ومنافسه
وبقي 39

رد: The 4th day of the English competition
 

pls don't keek me out :verycute:
I love you all :verycute:

رد: The 4th day of the English competition
 

رد: The 4th day of the English competition
 

السلام عليكم و رحمة الله و بركاته
فاتني السؤال:Cry111:

رد: The 4th day of the English competition
 

الله يوفقكم
شدو حيلكم :71:

رد: The 4th day of the English competition
 

رد: The 4th day of the English competition
 

The study of machines, both simple and complex, is in one sense a study of the energy of mechanical work. This is true because all machines transfer input energy, or the work done on the machine to output energy, or the work done by the machine.

Work, in the mechanical sense of the term, is done when a resistance is overcome by a force acting through a measurable distance. Two factors are involved: (1) Force and (2) movement through a distance. As an example, suppose a small aircraft is stuck in the snow. Two men push against it for a period of time, but the aircraft does not move. According to the technical definition, no work was done in pushing against the aircraft. By definition, work is accomplished only when an object is displaced some distance against a resistive force.

رد: The 4th day of the English competition
 

newton per meter

رد: The 4th day of the English competition
 

Work = Force (F) x distance (d).