To convert kilometers per hour (km/h) to meters per second (m/s), you can use the following conversion factor:
1 km/h = \(\frac{1000 \text{ meters}}{3600 \text{ seconds}} = \frac{1}{3.6} \text{ m/s}\).
Now, let's convert 1236 km/h to m/s:
\[ 1236 \text{ km/h} \times \frac{1 \text{ m/s}}{3.6 \text{ km/h}} = \frac{1236}{3.6} \text{ m/s} \approx 343.33 \text{ m/s}. \]
So, 1236 km/h is approximately 343.33 m/s.