How is a stopwatch used to measure the time interval of an event?

Hint:We need some watches to measure a short duration of time for only a short moment. For example, in sports, we need a watch to measure the time taken by the runner to complete the race and the watch is calibrated into minutes, seconds and microseconds.

Complete step by step answer:
A stopwatch has two buttons, one button is the start button, and another button is the stop button. If we want to record an event, we will press the start button and now the time would start elapsing, and we can then press the stop button to stop the time, and we can see the time covered till now. Now if we press the second button again then, the time will again resume to zero, and we can record the event once again.

Additional Information:
Nowadays, electronic stopwatches are used, which are very much precise about the measurement of time. For example, if a runner’s performance is tested then at off times in between the watch can be stopped and resumed again. For it is possible here to do a quality check on runner’s performance very closely.

Note:When the stop used in the event is of mechanical type then a lot of skill is needed to measure the time correctly as we want to record an event for seconds, then we have ensured a lot of preciseness to stop the watch at the particular instant.