Force & work

To be considered work done, there must be...
-a force acting on the object
-the object moves
-the movement of the object is in the same direction of the force

Work is measured in J(joules)
One joule is the amount of work done when a force of one newton moves an object by one metre in the direction of the force.
W=F x s
No work is done when ...
-the object does not move
-the object is perpendicular to the force
here is a video on work done:http://www.youtube.com/watch?v=IvcOYOO0Fvw&feature=related