# speed

Speed is the ratio of the distance traveled by an object to the time it takes. No
direction is specified, which means that speed is a scalar quantity. Velocity, by constrast, is a vector. Units of speed are meters per second (m/s), kilometers per hour (km/h), miles per hour (mph),
feet per second (f/s), etc. **Average speed** is given by total distance covered
divided by total time taken.