Principle: First of all, any measurement is a process of comparing a physical quantity with a standard (ie, a unit). The measurement of force is a process of comparing the effect of a force with the effect of a known force. If the effect of a force is the same as the effect of 1 cow, the magnitude of this force is 1 cow. Secondly, the elongation of the spring is proportional to the magnitude of the force applied. After determining the effect of 1 bovine force, it is easy to determine the effect of greater force and less force. In addition, the spring has good stability and can be reused. Therefore, the force of the force can be measured by a spring dynamometer.
Using
1. Can not be used beyond the range. (The balance, measuring cylinder, measuring cup, etc. can not be used beyond the scale, except for the scale)
(Additional note: Because the over-range use may damage the spring dynamometer and cause plastic deformation, resulting in errors. And the over-range is used, which will result in the measurement of accurate force, such as a 6N force, you use a range 5N spring force measurement, the pointer points to 5N, but in fact it is 6N, it produces an error.)
2. In the same direction: When measuring force, let the direction of the spring axis in the spring dynamometer be in a straight line with the direction of the measured force, and the spring should not rest on the dial.
3. The line of sight should be perpendicular to the dial.
After use:
Adjust the spring dynamometer to align the pointer with the zero mark
Precautions
The measured object cannot be pulled beyond the range.
The tool for measuring the force is called a dynamometer. The dynamometers commonly used in the laboratory are spring dynamometers, dynamometers and dynamometers.
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