Question

A racing car has a uniform acceleration of $4m{s}^{-2}.$ How much distance will it cover in $10s$ after start?

Answer 1

Using the equation of motion

$s=ut+\frac{1}{2}a{t}^2$

Given: $u=0$

$\Rightarrow s=\frac{1}{2}a{t}^2$

$\Rightarrow s=\frac{1}{2}\times 4\times {10}^2$

$\Rightarrow s=\frac{1}{2}\times 4\times 100=200m$

The racing car will cover $200m$ in $10s.$