Question

when we go up the stairs, is the work done by us positive or negative?​

Answer 1

Explanation:

Thus, The point of application of force doesn't move at all while the force is being applied. Thus, net work done by the ladder (or the stairs) is zero because there is no displacement of the point of application of the force. As soon as the displacement occurs, the force ceases to be applied instantaneously.

Answer 2

Answer:

when we move up the stairs the work done by us zero