Work

In physics, work has a special meaning, different to “normal” English. We say that work is done when there is movement against an opposing force.. 

For example, if Maria pushes a table, she is doing work against the friction force of the table against the floor.

There are three key ingredients to work – 
- force
- displacement
- cause
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In order for a force to qualify as having done work on an object, there must be a displacement and the force must cause the displacement.
The amount of work done (measured in Joules) is equal to the force used (Newtons) multiplied by the distance the force has moved (metres). 

Work done = force x distance moved
      (J)           (N)        (m)

Energy