Why can an egg stand with a little salt under it?

Because salt particles can increase friction, at the same time, salt particles will form a stable triangular support with the vertex of the egg sphere, thus supporting the egg.

Experimental principle of salt making eggs stand up: fine particles in salt rub against the surface of eggs to produce friction; At the same time, the bottom of the egg and the salt particles form a solid support on the desktop. Simply put, the contact area between the egg and the desktop increases and the contact surface is horizontal.

The center of gravity of the egg and the fulcrum of the whole supporting structure are in a straight line, so the egg can stand without falling down. If you change the salt into sugar or sand, the eggs will stand up.

Extended data:

1, pour a layer of salt on the flat table.

2. Put the egg on the salt and adjust it to the right position, and the egg will be still.

3. Take away the eggs, blow off the salt on the table, leave only a little salt on the table, and then put the eggs. At this time, you will find that the egg can still stand up.

There is no danger in this experiment, but in order to prevent the accident of eggs falling and breaking, the experiment should be carried out with parents.