A speedometer is a tool used to record a cars speed.
street legal or like rocket cars (land speed record cars) Not sure on the illegal ones but legal is the mclaren f1 (not f1 lm)
yes
In the modern era of jet powered land speed records, the current holder is Andy Green. He drove a vehicle called "Thrust SSC" to a speed of 760 m. p. h. . The record was set in 1997.
A GATSO speed camera
Pitsco cars began in the early 1970s as a teaching activity for seventh-grade. The cars were originally called Land Speed Record Assault Vehicles (LSRAVs) and are powered by CO2 cartridges.
"Broke a speed record" means that a person or vehicle has achieved a faster speed in a particular activity or event than any previous recorded instance. This can apply to various contexts, such as race cars, athletes, or machines like aircraft or boats.
A car can go at speeds up to 750 mph (land speed record car). A production car can go 267 mph (Bugatti Veyron SS).
Cars are designed and sold into an international market. Speed limits vary from one country to another and in Germany, for example, there are large sections of the road network that are free of speed limits. If it is safe, a car can be used at its top speed on such roads. Buyers will also compare cars by their top speed, even if they have no desire or ability to experience that speed, so it is used as one of many sales tools for manufacturers.
the record speed is 50 mph or 80kph
Photo sensors and chronometers are used to check for the speed. The vehicle breaks the photo sensor beam, and the chronometers record the speeds.
People love cars for their speed and design. A person with love for speed will love sports cars.
Wind speed may affect cars, effect change to aspects of cars or have an effect upon cars but, to say that wind speed effects cars is most likely a typo. I recommend changing the question.