The mechanical arm on the space shuttle, or what's called the Canadarm, can handle a 2200-kg satellite but, on the ground, it cannot support its own weight (Resnick, Halliday). Why is this?
What I am able to arrive at is that since it is moving a mass around in space, it is exerting a huge force. Second, on Earth, it collapses because the gravity overwhelms the normal force of the particles in the Canadarm.
Could anyone please explain it from a newtonian mechanics perspective (because the textbook chapter I got this problem was just about newton's laws)?