Calculating Work

In physics work done by a force is defined as the product of the force with which the direction of movement of the object style.
Can be formulated:   W = F . s

Work units in SI is joule. One joule is the magnitude of work done by force of one newton to move an object in same direction as force as far as one meter.
Relation work and energy is the magnitude of work done by a force in the process is the same as much as energy transferred.

Several work done by force
If the work done by first person and second person to move an object to the right as far as s is

W1 = F1 s (*) and W2 = F2 s (**)

It is known that the resultant of two force in same direction is F = F1 + F2, so the total work made ​​by two person were

W = F s, W = (F1 + F2) s

By entering F1 s = W1 (see *) and F2 s = W2 (see **), it is obtained

W = W1 + W2

In general it can be concluded as follows:
The work done by the resultant forces in same direction and the opposite direction, which causes it to move an object as far as s, equal to the amount of work by each force.