Question

A car starts from rest. It moves with uniform acceleration. In $10$ seconds, it attains a speed of $12km{h}^{-1}$ a straight road. Find its acceleration.

Answer 1

Given that,

Time $t=10\sec$

Velocity $v=12km/h=\frac{12\times 5}{18}m/s$

Now, the acceleration is

Using of equation of motion

$v=u+at$

$12\times \frac{5}{18}=0+a\times 10$

$a=\frac{12\times 5}{10\times 18}$

$a=\frac{1}{3}m/s^2$

Hence, the acceleration is $\frac{1}{3}m/s^2$