Definition of

Balance Scales

Balance Scales

A device for weighing. It has a balanced beam and two pans.

When the pans contain exactly the same mass the beam is in balance.

You can place an object in one pan and standard weights in the other to find what the object weighs.

Here balance scales are used to show that the box "x" has a mass of 4.

Try dragging the weights below:

../algebra/images/balance-drag.js