How to make a primary school student's manual balance scale is as follows:

Material preparation: ice cream stick, latex, ruler and nut.

1. Prepare the required materials and cut off half of one of the ice cream sticks.

2. Draw a line in the center of the ice cream stick with half cut off, and use the line drawn at the incision as a reference line to sharpen the ice cream stick.

3. Use a ruler to find the midpoint of another ice cream stick, and draw a reference line in its center, as shown in the picture.

4. Stick two ice cream sticks together vertically with latex, so that the reference lines are completely coincident, and make a hole in the ellipse of the ice cream stick.

5. Nail a nail in the center of the longer ice cream stick, which will make it stronger, and install a lifting ring at the top.

6. Hang a heavy object on the nail, which will always be perpendicular to the ground and serve as a reference when measuring.

7. Hang a clip in the two holes of the ice cream stick, and you can make two trays with a flat plastic bottom for holding heavy objects.

8. The balance has been made, and now it can be used to weigh things. Nuts can be used as weights to be placed at one end of the balance and the things to be weighed at the other side.

the manual balance scale is a traditional weighing tool.

1. Manual balance scales are made of materials such as metal or plastic. The principle of manual balance scale is lever balance, and its power arm and resistance arm are equal, so when the weight of articles acts on the balance scale, the balance scale can maintain balance. The advantages of manual balance scale are high precision, good stability and convenient use, so it is widely used in the fields of commerce and laboratory.

2. The structure of manual balance scale is relatively simple, and it usually consists of scale plate, scale beam, weight and so on. The weighing pan is used for placing articles, and is generally made of light materials such as metal or plastic. The balance beam is a lever connecting the balance plate and the weight, and is generally made of solid materials. The weight is used to adjust the weight, and its weight can be changed to adapt to the weighing of items with different weights.