EVERYDAY SCIENCE

Detailed explanation-1: -Therefore, velocity is expressed in metres/second or m/s. The SI unit of velocity is metre per second (m/s). Alternatively, the velocity magnitude can also be expressed in centimetres per second (cm/s).

Detailed explanation-2: -Kilometers per hour is a unit of measurement using length in kilometers and time in hours, and thus it acts as a derived unit for both speed and velocity.

Detailed explanation-3: -Velocity is speed with a direction. So if something is moving at 5 km/h that is a speed.

Detailed explanation-4: -For example, if I can go 60 miles in one hour, then I can do that by driving 60 miles per hour, or mph. The word ‘"velocity"’, however, means that we’ve added a direction. If I am going 60 mph and I am heading north, then my velocity is 60 mph north.