$\text{Dane:}$  

$\text{t}=2\text{s}$  

${\text{v}}_{\text{p}}=100\frac{\text{km}}{\text{h}}$  

${\text{v}}_{\text{k}}=136\frac{\text{km}}{\text{h}}$  

$\text{Szukane:}$  

$\Delta \text{v}=\text{?}$  

Obliczamy przyrost ze wzoru:

$\Delta \text{v}={\text{v}}_{\text{k}}-{\text{v}}_{\text{p}}=136\frac{\text{km}}{\text{h}}-100\frac{\text{km}}{\text{h}}=36\frac{\text{km}}{\text{h}}=36\cdot \frac{1000\text{m}}{3600\text{s}}=10\frac{\text{m}}{\text{s}}$