Work = Force x Displacement in the direction of the force
In this case, the force is the weight of the object being lifted, which is 2500 N. The displacement is the vertical distance the object is lifted, which is 2 m. Since the object is lifted in the same direction as the force, the displacement is positive.
Therefore, the work done in weight lifting 2500 N from the floor to over his head a point 2 m above ground is:
Work = Force x Displacement
= 2500 N x 2 m
= 5000 J
Therefore, he did 5000 J of work in weight lifting 2500 N from the floor to over his head.
