How can I measure the speed of a tennis serve without special equipment?
Measuring the speed of a serve
- Have one person hold a stick (e.g., a broom handle) slightly above the net on one side of the court.
- Stand on the other side of the net, facing the stick.
- Hit a serve toward the stick.
- When the shuttlecock hits the stick, the person holding the stick should drop it.
- Time how long it takes for the shuttlecock to travel from the stick to the ground.
- The speed can be calculated using the formula: speed = distance / time. The distance is the height of the stick above the ground. The time is the number of seconds it takes for the shuttlecock to travel from the stick to the ground.
Considerations
- Use a high stick so that the shuttlecock doesn't hit the stick.
- Measure the distance from the ground to the top of the stick.
- Start the stopwatch when the shuttlecock hits the stick.
- Stop the stopwatch when the shuttlecock hits the ground.
- Repeat the process several times and average the results.
Questions 1. What is the formula for calculating speed? 2. What is the distance used in the formula? 3. When do you start the stopwatch? 4. When do you stop the stopwatch? 5. How can you improve the accuracy of your measurements?
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