Question

define speed. write its mathematical expression and si unit. state whether it is scalar quantity or vector quantity.

Answer 1

speed is defined as distance per unit time.
si unit is
s=d/t
it is scaler quantity

Answer 2

HELLO DEAR,


★ Speed ★ :-
The distance travelled by a body per unit time is called speed.
∴ [ its unit is = meter/second (m/s) ]


here, is the formula ,

Speed = Distance Travelled/Time taken

(V = s / t) m/s

where,

v = speed , s = distance travelled , t = time taken

★ It is a scalar quantity because it has only magnitude and does not have direction. So we know vector means (Vectors are quantities which have described by both a magnitude and a direction).


hence it is scalar quantity





I HOPE ITS HELP,
THANKS