Talking about the working principle of balance

This balance is achieved by using the lever principle.

A balance is an arm. Balance is a weighing instrument, and it is also an instrument for measuring the mass of objects. It is made according to the lever principle. There are two small plates at both ends of the lever, the right end is the weight and the left end is the weighed object. The center of the lever is equipped with a pointer. When the two ends are balanced, the two ends are equal in mass.