A coach wants to find out the speed of the runners on a track team. tell what simple equipment the coach needs in order to do this and explain how it should be done

To measure the speed of runners on a track team, a coach can use a simple piece of equipment called a "stopwatch" or "chronometer."

A coach can use a cheap piece of gear called a "stopwatch" or "chronometer" to gauge the running speed of the track squad.

A stopwatch is a tool for keeping track of time that can precisely calculate the length of an event in seconds, milliseconds, or other time intervals. It is frequently used in timing applications in sports, such as track and field.

Usually, a stopwatch has three buttons: a start button, a stop button, and a reset button. Pressing the start button causes the stopwatch to start keeping time. The stopwatch stops counting when the stop button is pressed, showing the amount of time that has passed.

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The coach can determine runners' speeds using a stopwatch and measuring the distance run. While the stopwatch's ±0.05-second uncertainty is generally suitable for timing sprints, it may not sufficiently discern between very close times, and it cannot conclusively determine small improvements in the sprinters’ performances.

To measure the speed of runners on a track team, a coach can use simple equipment like a stopwatch and a known distance. The procedure involves starting the stopwatch when the runner begins sprinting from the starting line and stopping it as soon as the runner crosses the finish line. The speed is then calculated by dividing the distance by the time it took the runner to complete the run.

Considering that the stopwatch has an uncertainty of ±0.05 seconds and the runners' sprint times range from 11.49 seconds to 15.01 seconds, the stopwatch seems suitable for timing purposes. However, when it comes to distinguishing very close sprint times, such as the ones from the school's last track meet where the winner clocked in at 12.04 seconds and the second-place runner at 12.07 seconds, the uncertainty of the stopwatch might be too large to definitively differentiate between such close results.

For the team's top sprinter who clocked 12.04 seconds on one occasion and 11.96 seconds on another, despite the small difference which seems to indicate improvement, due to the uncertainty in the stopwatch, we cannot conclusively affirm this week's time is faster. An uncertainty of ±0.05 s means the true time could potentially be 0.05 s faster or slower than the recorded time, making the two times statistically indistinguishable.

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