A force of 20 N acts on a body and displaces it 2m along the direction of force. Then the work done by the force is:
40 J
10 J
20 J
15 J
W = F.S cos θo = 20 × 2 cos 0o = 40 J
A box follows a zigzag path to reach point B from point A. The actual length of the path is 5 m and the length of the straight line joining the two points is 2 m. If a force of 5 N acts on the box in the direction of displacement, then the work done on the box by the force is: