Tips on how to use stopwatch

How to Use the stopwatch? How should the stopwatch read?

Tools/Raw Materials

One stopwatch

How to Use stopwatch

Know stopwatch

There are two needles in the general stopwatch (stop table), the long needle is the second hand, and each turn is 30 s; the short needle is the minute needle, each

A turn is 15 min.

Make a good clockwork before use, and the button at the top of it is used to turn on and stop the stopwatch.

First press, when the stopwatch starts to remember

• The second press, the pointer stops moving, indicating the time between the two presses.

• The third time the two pointers are pressed back to the zero scale.

• The reading of the stopwatch.

As can be seen from the figure, two times, the pointer in the small disk on the stopwatch has turned, indicating the measurement time

It has been more than half a minute. When reading the number, read the time in the small disk, and then add the big disk.

The time the long pointer refers to, the sum of the two is the reading of the stopwatch.

If the pointer in the small disk does not rotate, indicating that the measurement time is less than half a minute, the long pointer is directly read

Time is the reading of the stopwatch.