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Measurement is the process of obtaining the magnitude of a quantity, such as length or mass, relative to a unit of measurement, such as a meter or a kilogram. A measurement answers the general question, “how many?” as in how many miles, or millimeters, or gigahertz. As measurement is basically about counting, measurement is conducted in numbers and is quantitative, in comparison to other observations which may be made in words and are qualitative. The term measurement can also be used to refer to a specific result obtained from the measurement process. It is an important component in sports, more precisely in competitions.
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Some types of measurements in sports activities are:
{draw:frame} {draw:frame} Time measurement: Time is part of the measuring system used to sequence events, to compare the durations of events and the intervals between them, and to quantify the motions of objects. Time is measured with either analogue or digital stopwatches. Measuring time with these instruments introduces an error called the human reaction time which is unavoidable in sports competitions. The SI unit of time is minute. {draw:frame} Distance measurement: distance is a measure of the interval between two locations. The distance is the answer to the question, “How far is it from this to that or between this and that?”It is used, in sport, to measure track length, Length and width of pitches. A measuring tape is used for this purpose. The SI unit of length is meter. Speed measurement: Speed is change in distance with respect to time. Speed is a scalar rather than a vector quantity; example: the speed of a body tells one how fast the body is moving but not the direction of the motion. If during time t a body travels over a distance s, then the average speed of that body is equal to s/t. The speed and direction of a body’s motion together determine the body’s velocity.
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Close Encounters With the Effects of Time Dilation How does it feel to be going speeds near that of the speed of light What is it like to return to Earth to find that your best friend who was the same age as you is now older than you You might talk to a man named Bob Smith. Bob recently returned from his trip to the edge of the universe and we were fortunate enough to talk to Bob about what he ...
Deceleration measurement: Things can slow down as well as speed up. Deceleration is slowing down which means that the change in velocity is negative. Sometimes deceleration is called retardation.
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Running competition
Time is calculated with, normally, a stopwatch. In running competition, time should be measured in order to, later, calculate the runner’s speed and even his acceleration and deceleration during his course. Time is also measured in order to compare the times with other competitors around the world. In world competitions, time should be measured accurately as competition is tough. For this purpose, a DGL-time for palm is used as it is a more accurate device. But a measurement can never become accurate due to human reaction time.
The DLG time for palm
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The length of the inside lane is usually either 400 meters or 1/4 mile. All lanes on a running track share a common finish line. For events longer than 110 meters or so, each lane’s starting line is a little ahead of the one to the left of it. As the length is already measured, there’s no need to measure the length before running. It is measured with a measuring tape.
Speed, acceleration and deceleration These three are measured manually by formulae. Some of them are as follows:
Average speed=Total distance travelledTotal time taken
OR
Acceleration=Change in velocityTime
OR
deceleration=Change in velocityTime
(Where the answer is negative)
Reference:
Google.com
Wikianswers.com
Science.com
Wikipedia.org
And many more.
