Work, energy and power GapFill

Whenever a force acts to move a body, work is done. Work done is equivalent to  distance coveredacceleration producedenergy transferredrate of transferring energy, and has units of  J or N mJ or N m⁻¹J or WJ or N m⁻².
Power is the  rate of doing workchange in speedtotal work donedistance covered in a process, and has units  W or N mJ or N s⁻¹W or N s⁻¹W or J s⁻¹.
The area under a force-displacement graph gives  change in momentumrate of doing workwork doneefficiency.
The efficiency of a process is the ratio of  input energy ÷ useful output energywork done ÷ time takenuseful output energy ÷ input energydistance covered ÷ time taken. This can be expressed as either a ratio or a percentage.
In all processes, energy is neither created nor destroyed; however, it may be dissipated when work is done by  light and soundchanges in momentumresistive forcesenergy conservation.