A body starts moving from the rest and in $5\ seconds$ its velocity becomes $50\ m/s$. Find the acceleration.

Here initial velocity $u=0$

Final velocity $v=50\ m/s$

Time $t=5\ seconds$

Therefore, acceleration $a=\frac{v-u}{t}$

$=\frac{50-0}{5}$

$=\frac{50}{5}$

$=10\ m/s^2$

Therefore, the acceleration is $10\ m/s^2$.