Piggy back Rides

Thanksgiving break is coming!! I cant wait! Actually, I cant wait for college apps to be OVER!! i see the light in the dark tunnel I am in right now. So here we have a picture of little 100-pound Jill piggy backing way-over-100-pound Iris, me. If you've been following my blogs, you should know by now that the normal force exerted on Jill by the ground is much greater with me on her, because of intense increase in weight. You may also notice that Jill is standing on one leg, which should make it even harder for her to balance. You may wonder why doesn't she fall over? It's because her upper body or center of mass has shifted over her left leg. Since Jill's (and every human's) center of mass is above her legs or support, she will always be in an unstable equilibrium. This is why we are constantly shifting our weight to different areas in order to gain (as close as possible) stable equilibrium. Virtually any person, weak or heavy, small or big, should be able to handle any amount of weight if they know where their center of mass is.