For Vehicles:
* Speedometer: A common device found in cars and other vehicles. It uses a cable connected to the transmission to measure the rotation of the wheels and displays the speed in miles per hour or kilometers per hour.
* Radar gun: Emits radio waves that bounce off a moving object and calculate its speed based on the Doppler shift. Used by law enforcement, sports officials, and other professionals.
* Laser speed gun: Works similarly to a radar gun but uses a laser beam instead of radio waves. More accurate than radar guns, but also more expensive.
* GPS tracking devices: Track location over time and use that data to calculate speed. Can be used for vehicles, people, or objects.
For Other Objects:
* Pitot tube: Measures the difference in pressure between the static air and the air flowing past an object. Used on airplanes and other aircraft to measure airspeed.
* Anemometer: Measures wind speed. There are various types, including cup anemometers, propeller anemometers, and hot-wire anemometers.
* Tachometer: Measures the speed of rotation of a shaft or engine.
For Measuring Speed Over Longer Distances:
* Chronographs: Measure the time it takes for an object to travel a specific distance. Often used for measuring the speed of bullets or projectiles.
* Stopwatch: A simple device that measures time, used in conjunction with a known distance to calculate speed.
Specialized Equipment:
* High-speed cameras: Capture images at very high frame rates, allowing for the measurement of speed and motion of objects that are moving too fast for the human eye to see.
* Doppler radar: Used for measuring weather patterns and speed of wind and precipitation.
* Sonic anemometer: Measures wind speed and direction using the speed of sound.
The specific equipment used will depend on the application and the type of object you are measuring.
