The weighing beam is also called the weight, the wooden pole of the weight, and the parts of the weight, which are inlaid with metal scales for measurement. It is marked with scale units to support the weight and weight of the object, and the weight is marked after measurement.

Mechanical explanation of weighing beam

The fixed point around which the lever rotates is called fulcrum, the force that makes the lever rotate is called force (the point of application is called the point of force action), and the force that hinders the lever from rotating is called resistance (the point of application is called the point of resistance action). When the rotation of force and resistance cancel each other out, the lever will be in a state of balance, which is called lever balance, but lever balance is not the balance of force.

When the lever is balanced, it remains stationary or rotates at a constant speed. A straight line passing through the point of force in the direction of force is called the line of action of force. The vertical distance L 1 from fulcrum o to the action line F 1 of force is called the force arm, and the vertical distance L2 from fulcrum o to the action line of resistance F2 is called the resistance arm.