The series and parallel connection of the parallel dynamometer of the spring dynamometer is similar to the string and parallel connection of the circuit. In parallel with the circuit, the parallel circuit increases the current, and the parallel connection of the dynamometer increases the measurement range. Such as: (l) weight of 10N, hanging under two identical dynamometers, each number of indications (2) two dynamometers with a scale of 1 () N in parallel, up to more When the object is measured and measured with a dynamometer, the one that always follows is that the dynamometer should be in equilibrium. When connected in parallel, the object is subjected to a balancing force: gravity and upward pulling force. The upward pulling force has two different forces, which are from two dynamometers, and the tension of each branch is equal. Therefore, the double pulling force is equal to the gravity of the object, that is, the pulling force is equal to half of the weight of the object, and the reading is also one-half of the weight of the object, so the first question and answer bar is SN, and the second small question is 20N. Visible, the dynamometer The parallel connection can increase its weighing to some extent. This method can be used if a suitable dynamometer cannot be found in daily life and a heavier object is to be measured.
The series example of the spring side force meter connects N tensometers weighing the same 10ON (self-weight) in series, measuring an object with a weight of 50N, and how many analyses are used to measure the spring force connected to the object. It is calculated as the research object to analyze the force: by the two forces, the tension of the object to it downward and the tension of the second spring to it are balanced. Therefore, the first force measurement is 50N. Similarly, the second dynamometer is also affected by two forces: the first pull on its downward force and the third pull on it. The display is still 50N. Similarly, each display is the same, both are SON. Visible, the skin of the dynamometer cannot change the measurement range. In summary, spring balances use more. But no matter what, we should always grab a point. Stress analysis. At the same time, it should be noted that when the gravity reading is measured by the spring force measurement, the object and it are in equilibrium. At this time, although the resultant force is zero, it does not mean that the indication must be 0. Only seize this point. No matter how it changes, whether it is the separate action of the spring dynamometer in series or in parallel, we can accurately judge the change of its indication. In order to achieve the purpose of learning.
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