Question

Question #fadc0

Answer 1

0

Explanation:

Work = Fd

where F and d must be in the same or opposite direction.

Now that F= weight = mg. The weight is pointing downward.
Since the force does not move up and down, the effective distance traveled by the force is thus d=0, even though the body itself has moved sideway for a distance `Deltax = 20m/s*t`.

Therefore,

Work`= Fd =mg*0=0`