How to read mechanical stopwatch correctly

I believe that we must have used mechanical stopwatches when we were at school, which should have been studied in junior high school physics. Mechanical stopwatches are necessary knowledge. Mechanical stopwatch is a professional timing tool, but it is limited to classroom teaching and is not popular. However, we can't remember the lectures and simple demonstrations of mechanical stopwatches. We must practice, practice more to remember it. How to use the mechanical stopwatch? What do you think today?

mechanical stopwatch

This is a common timing tool in the laboratory. It is driven by low-frequency balanced vibration system, and then driven by clockwork and anchor escapement mechanism. The hands are driven by a gear system, so the time can be displayed. However, the mechanical stopwatch is equipped with a special start-stop mechanism. This is an instrument commonly used in the laboratory. Its dividing value can reach 0.0 1 sec.

How to read mechanical stopwatch correctly

When we stop the watch mechanically, we will see that there are two dials, one is small. There are generally two kinds of dials, 30 scale and 60 scale. Each 30-scale grid represents half a minute, and each 60-scale grid represents 0.25 minutes. We must first look at what kind of dial it is and know how many minutes each grid is.

A big circle represents half a minute, and a * * * has sixty major scales, but there are five minor scales between every two major scales, so a major scale represents half a second and a minor scale is 0. 1 second, which is why a mechanical stopwatch can be accurate to 0. 1 second.

When we study, we need to add the minutes on the small plate to the seconds on the big plate. Divide it in the small dish, and the second is in the big market. We need to see whether it is the first half minute or the second half minute, and which direction to point. The first half minute of the market is 0-30 seconds, and if it is the second half minute, it is 3 1-60 seconds.

How to use a mechanical stopwatch

Mechanical stopwatch is a commonly used instrument for measuring time interval, which mainly uses the isochronism of pendulum to control the rotation of hands to time. There is a watch handle directly above the watch with a button on it. We turn the button and wind it up, so that we can stop the watch and have the power to walk. We press the button with our thumb and the stopwatch will start counting. If we press it again, the stopwatch will stop and we can read. If you press it again, you will find that the stopwatch is zero and you can start the next time.

That's all the mechanical stopwatch gives you. Through the above introduction, do you know how to use the mechanical stopwatch and the correct reading method? In fact, it is easy to master as long as you practice more and don't stay in the teacher's demonstration and preaching. I hope the above content is helpful to you.

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