Stopwatch in physics definition
A stopwatch is used to measure the time interval of an event.
Types of stopwatch
- Digital stopwatch
- Mechanical stopwatch
How to read Digital stop watch?
It is commonly used in laboratories,it can measure a time interval up to 0.01 second.It starts to indicate the time lapsed as the start/stop button is pressed.As soon as start/stop button is pressed again,it stops and indicates the time interval recorded by it between start and stop of an event.A reset button restores its initial zero setting.
How to read analog or Mechanical stopwatch?
A mechanical stop watch can measure a time interval up to 0.1 second.It has a knob that is used to wind the spring that powers the watch.It can also be used as a start stop and reset button.The watch starts when the knob is is pressed once.When pressed second time,it stops the watch while the third press brings the needle back to zero.