I was wondering if someone could help me with my schoolproject. I want to see the speed on my longboard for example after 10 metres with a beginning speed of 10m/s. Like a sensor that tells my speed after a given distance and how long it takes to reach the sensor. I also would like to know if it is possible to make multiple sensors. I could find lots of guides on how to make a speedometer but not one that tells my speed for a specific distance.
Sorry for my bad english.
Thanks in advance