Question

Is work done if you pull a child in a wagon?

Answer 1

The answer is A. yes, the force applied is parallel to the direction of motion

Answer 2

Answer:

Option A

Explanation:

The work done on a body is the dot product of the force applied (F) and displacement (s) of the body.

W = F·s

⇒W= F s cosФ

where, Ф is the angle between the applied force and direction of motion.

When a child is pulled in a wagon, the force applied is parallel to the direction of the displacement. Thus, Ф =0°

W = F·s

⇒W= F s cos 0°

Hence, a non zero work is done when a child is pulled in a wagon.

Option A is correct.