Explanation: \(\text{Hints: } v^2 = u^2 + 2as\) \(\text{Solve: } v = 0, u = 36 \, \text{km/h} = 10 \, \text{m/s}\) \(v^2 = u^2 - 2as \implies a = \frac{u^2}{2s} \implies a = \frac{(10)^2}{2 \cdot 500} = 0.1 \, \text{m/s}^2.\) \(\text{Ans. (A)}\) \(\text{ব্যাখ্যা: } 500 \, \text{m এর মধ্যে ট্রেনটিকে থামাতে হবে, তাই } a = 0.1 \, \text{m/s}^2.\)