Question

When your nose touching the end of the door put your feet astride the door why you cannot rise up your toes

Answer 1

Answer:

The normal way of rising on one's toes is to lean forward so the center of gravity of one's body exerts a torque about the point at the ends of ones toes that tends you lift one's heels.

With your nose against the door and your feet to either side of the door, you can't lean forward and the torque due to the center of gravity of you body acts to keep your heels on the floor.