Question

If a man stand on chair changes of its breaking are more but if a man sitting on chair Changing of its Breaking are less explain

Answer 1

While seating on the chair the body weight is uniformly distributed over the chair including the seat resting and back resting.

In this posture, the body is in a balanced position.

While standing on a chair the entire body load is concentrated at one point on the seat and failure of the chair seat wood or rather a plank may happen.