"When a force acts upon an object to cause a displacement of the object, it is said that work was done upon the object. There are three key ingredients to work: force, displacement, and cause. 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." Source:http://www.physicsclassroom.com/class/energy/Lesson-1/Definition-and-Mathematics-of-Work
The work equation is
Solution: To solve for displacement, the work equation will have to be rearranged, so the
When dividing a fraction by another fraction, you invert the second fraction and then multiply.