Question

Define velocity. State its unit.

• A. Velocity is defined as the rate of change of distance of a body with respect to time. Its unit in SI is $km/s$.
• B. Velocity is defined as the rate of change of displacement of a body with respect to time. Its unit in SI is $km/s$.
• C. Velocity is defined as the rate of change of distance of a body with respect to time. Its unit in SI is $m/s$.
• D. Velocity is defined as the rate of change of displacement of a body with respect to time. Its unit in SI is $m/s$.

Answer 1

The correct option is D Velocity is defined as the rate of change of displacement of a body with respect to time. Its unit in SI is $m/s$.

Velocity is a vector quantity that refers to the rate at which an object changes its position. It is a vector expression of the displacement that an object or particle undergoes with respect to time.
The SI unit of velocity is meter/second.