Why are you unable to lift up your right foot if you lean your left foot and left shoulder against a wall ?

Question

i need this urgently for my science project . please help out !

okay basically , we have to describe a phenomena. in this case, its when i lean my left foot and left shoulder against a wall , i am unable to lift up my right foot . try it . you really cant .
i need the concept behind it , but i cant find it anywhere . really need help . if you know anything or hv any websites to recommend, please tell me ! THANKS .
btw, some examples of the concept : centre of gravity . when i lean against the wall my centre of gravity is not balanced . thus , blablabla . something lik that .

Answer 1

When you position yourself that way, your center of mass is above a point to the right of your left foot. Thus you can't stand on the left foot alone; you'll topple over. Of course you can raise your right foot quickly and momentarily; it's not paralysis. But your reflexes tell you to put it back on the floor right away so as not to fall over.

Answer 2

Well, you're on the right track!

Center of gravity to the key concept here. This is the point within an object where it would balance if given a suitable support.

This is also the point where, in physics terms, gravity acts on your body. If you were to jump out of a plane, you could twist and flip as you pleased, but that point would still fall in a perfectly straight line towards the ground. When you stand on two feet, gravity is pulling down on this point, but your feet push you up, against the ground.

Now, you -can- stand on one foot, but this will require you to rearrange yourself so that this center of gravity is directly over that foot. Try it for yourself and see where your belly-button is in relation to the foot you're standing on.

The reason that you "cannot" lift your right foot in this scenario is that the wall prevents you from moving your body in the way required (specifically, shifting your upper body to the left). Your body knows that lifting that foot will cause you to fall over, and your nerves tell you not to do it! In actuallity, you can very easily lift your right foot (I just tried it), but you -will- fall over.

Answer 3

You are wrong, I just did it.

I fell, but I did it.

Shoulder and left foot against the wall. Back at a right angle to the wall. Lifted my right leg, and began to fall sideways (to the right).

Center of gravity is involved, but it is primarily because you just took away one of the 2 points of support.

Your legs were holding you up. Because of touching the wall with your left shoulder and foot, most of the support was coming from the right (that's where center of gravity comes in).

The body moves in such a way that it restores balance to the center of gravity (by falling over).

Answer 4

Left.

Answer 5

You are off balance because it prevents you from standing up straight. When your foot goes against the wall your upper body gets forced away from the wall.

Answer 6

Your body.The pressure from your 2 parts of your body on it,your body knows that you would fall.Plus,all your pressure is there,so its to much to lift.