Question

Define speed. What is the SI unit of speed?

Answer 1

Speed :

$1.$The distance travelled by a particle per unit is called speed.

$Speed=\frac{Dis\tan ce}{time}$

$2.$ Speed is a scalar quantity. Speed depends on the path.

Unit of Speed:

$1.$The S.I.unit of speed is metre/second $(m/s)$.

2. The C.G.S. unit of speed is centimetre/second $(cm/s).$