MP Board · Class 9 · Science · MotionDefine acceleration. Write its formula and standard SI unit.

Acceleration is defined as the rate of change of velocity of an object with respect to time. It measures how much the velocity of a moving body changes in a unit time interval. Mathematically, it is given by the formula: $$a = \frac{v - u}{t}$$\nwhere $u$ is the initial velocity, $v$ is the final velocity, and $t$ is the time taken. Acceleration is a vector quantity because it possesses both magnitude and direction. The SI unit of acceleration is meter per second squared ($\text{m/s}^2$).