Meters per second (m/s)
Meters per second (m/s) is the SI unit of speed or velocity. It represents the distance traveled in meters over one second.
It is used mainly in physics and engineering from describing the speed of a moving vehicle to the velocity of an object in free fall. It's simplicity makes it a good choice for describing speed and comparison with other units of speed.
Kilometers per hour (kph, km/h)
Kilometers per hour (kph or km/h) is a unit of speed. Kph is a unit commonly used to express the speed of vehicles, such as cars and trains.