Question

define speed and velocity with their SI unit?​

Answer 1

Answer:

Speed and velocity are both measured using the same units.The SI unit of distance and displacement is the meter. ... The SI unit of speed and velocity is the ratio of two — the meter per second.

Answer 2

Speed !!

Distance travelled by the particle in unit time interval is known as speed.

The rate of change of any object with respect to time is also called Speed .

$Speed = \frac{Distance}{Time}$

SI unit → m/s or cm/s.

Speed is a Scalar Quantity because it has only magnitude.. It's directionless.

Velocity !!

The velocity is the speed of an object moving in a definite Direction.

$Velocity = \frac{Displacement}{Time \: taken}$

SI unit → m/s.

It's a vector Quantity because it has magnitude as well as direction.