Question

define acceleration and write its mathematical expression and state whether it is a scalar or vector quantity

Answer 1

Acceleration: Acceleration is the rate of change of velocity. Once there is a change in velocity, the object is said to be accelerated.

Here is the formula:

a = $\frac{v-u}{t}$

In the formula,
u - Initial velocity
v - Final velocity
t - Time.

Acceleration is a vector quantity

Answer 2

$\textbf { !! Hey Mate !! }$

your answer is ---

→ The rate of change of velocity is called acceleration .

suppose a body moving from A to B with initial velocity u and at point B it's velocity is v called it final velocity , also time taken by body travel from A to B is t.

so,

acceleration =$\frac{final \: velocity - initial \: velocity}{time \: taken}$

or , a = v-u/t

→ it's SI unit is m/s^2

→ there is velocity in formula of acceleration and we know that velocity is vector quantity so , acceleration is a kai. vector quantity .

$\textbf {HOPE IT HELPS YOU }$