Work and change of energy

Work and change of  energy: Potential or Kinetic 

Potential - Potential energy and Work 

Work       W= F|| * d  

Positive and negative work      Scalars     

Total work         

Work of  position dependent force          

WA,B      work done  on the body A  by  the force B   

Kinetic energy         

Work energy theorem - change of the kinetic energy of a body  is equal to the total work done on it.

Work is also  energy in transfer

( WA )total   is positive  then body A is gains  kinetic energy

( WA )total  is negative  then body A loses kinetic energy