A 40-tonne articulated truck increases its highway cruising speed from 80 km/h to 90 km/h. According to the kinetic energy formula ($E_{kin} = (1)/(2) m v^2$), by what percentage does the vehicle's kinetic energy increase?

1. Approx. 26.5% increase ($1.125^2 ≈ 1.2656$)
2. Exactly 12.5% increase
3. 50.0% increase
4. No increase, because kinetic energy depends only on vehicle mass