When a body is moving upward with a constant velocity, the net force acting on the body is zero. In this case, the work done on the body is also zero.
The work done on an object is given by the formula:
Work = Force × Distance × cos(θ)
Where:
- Force is the net force acting on the object.
- Distance is the displacement of the object.
- θ is the angle between the force vector and the displacement vector.
Since the body is moving upward with a constant velocity, the net force acting on the body is equal to zero because the gravitational force and the opposing force (such as air resistance) are balanced. Therefore, the work done is zero because the force is zero.
In other words, when an object is moving with a constant velocity, there is no change in its kinetic energy, and thus no work is done on the object.