Why doesn't the slump fall?

Why is the tumbler never falling? The square bricks are very solid, but it is very easy to collapse many bricks into a stack of bricks. A jug of water only filled half the pitcher, the bottle stood very firmly, but if the vase had no water or filled with water, it was very easy to fall.

Explain the cause of the tumbler never falling

These two examples show that, in order for an object to stand firm, not easily toppled, must satisfy the following two conditions: First, its bottom area must be large; second, its weight must be concentrated on the bottom and the center of gravity must be low. The object's focus must be the force of gravity.

For any object, the larger its bottom area, the lower the center of gravity, the more stable, stable and not easily spilled. For example, an object with a tower-shaped architecture is always a large bottom, above the point. Or when transporting goods, must put heavy goods down, light up.

The flip-flop is a typical object whose structure obeys this principle. The whole body of the swing is very light. Only its lower part has a relatively heavy lead or iron, and therefore its focus is very low. On the other hand, the lower part of the flip is very big and round, it's easy to wobble. When the flip is tilted to one side, due to the fulcrum (the contact point between the tumbler and the table) there is a change, a focus and a fulcrum that are not on a straight line, now, under the influence of gravity , the tumbler will swing around the fulcrum until the normal position is restored. The greater the inclination level of the slipper, the greater the shaking effect that the gravity creates makes the tendency to restore the original position as clear as possible, so the tumbler does not fly now.

Like a tumbler, static objects after undergoing small impacts can restore their equilibrium to their original position, in physics called stable equilibrium. As for spherical objects such as ping pong balls, soccer balls, or volleyballs, after being subjected to external forces, they can maintain balance in any position. This state is called balance in every position . Objects that can balance in every position with focus and fulcrum on the same line, the height of the center never changes, the pen placed horizontally on the table is a kind of balance in every position, no matter where it rolls, the center height never changes.