Train

The train is running at speeds of 98 km/h. From the beginning of braking to full stop, the train runs for 2 minutes. If the train slows the braking equally, calculate the distance from the location where you need to start to brake.

Final Answer:

s =  1633.3 m

Step-by-step explanation:

$$\begin{gathered} v_1=98\text{km/h}\to \text{m/s}=98:3.6\text{m/s}=27.22222\text{m/s} \\ {t}_1=2\text{min}\to \text{s}=2\cdot 60\text{s}=120\text{s} \\ a=v_1/t_1=27.2222/120=\frac{49}{216}\doteq 0.2269{\text{m/s}}^2 \\ s=\frac{1}{2}\cdot a\cdot t_1^2=\frac{1}{2}\cdot 0.2269\cdot 120^2=1633.3\text{m} \end{gathered}$$

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