Question

Define acceleration.....

Answer 1

=> The rate of change of velocity of an object with ab object with a time is called acceleration. If is vector quantity. S.I. unit is m/s^2.

Answer 2

Their velocity can change due to a change either in their speed or in their direction or both . Whenever their velocity is changing they are said to be accelerated . Thus , " the acceleration of a body is defined as the ratio of the change in velocity to the time taken in producing that change " .

$acceleration = \frac{change \: in \: velocity}{time \: taken}$

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