The more mass the greater the gravity. Mass equals gravity.
The relationship between the Location of the centre of gravity and stability is that the higher the centre of gravity then the lower the stability.
Yes they do.
The center of gravity must be over the base of support. Any sideways motion of the center of gravity must result in it being raised.
They are in orbit around their common center of mass. Gravity and centrifugal force are in balance.
Center of Gravity
The greater the distance from the axis of rotation (i.e., pivot point) to the center of gravity of an object, the greater the torque required to rotate the object.
Assuming that each person is lifting equally the answer is 100 lbs each. The total weight 200, divided by 2. In reality it would depend on the center of gravity for the box, and also how evenly the weight of the box is distributed, plus also the height of the two lifters and the positions of their hands relative to the box's center of gravity.
The center of gravity is the average location of weight of an object, meaning that a ball, for instance, will have a center of gravity in the cent of the ball. A persons center of gravity is generally around the hip area, you can test this by leaning to one side, when you begin to tip naturally that's because your center of gravity is leaning too far out over your support, or legs.
The center of gravity of a ring is at the center of the ring.
This is because you are poorly balanced when the load is away from your center of gravity. The poor balance leads to you pulling muscles and damaging your back.