What does it mean when work is positive?

To have a positive job, the two vectors must have the same direction

Explanation:

Work is a scalar defined as the scalar product of two vectors, the froce and the displacement. To have a positive job, the two vectors must have  

collinear and that their arrows point in the same direction.

You can also appreciate this from the work equation

       W = F. r

bold indicate vector

      W = F  r cos θ

With θ the angle between force and displacement

hey , the answer is c

the body's situation won't change the forces are equal opposit and on the same body