Mathematically, work done is defined as the dot product between force vector and displacement vector, and it’s written as, work done be W=FScos   now, the nature of work meaning is that, if the value of cos   is positive then the nature of work done will be positive and is the value of cos   is negative, then the nature of work done will be negative. As well as if the force vector and displacement vector are perpendicular to each other, then the nature of work done will be zero.