Answer:
Force of 540 Kgm/s^2 is closest to the net force acting on the vehicle.
Step-by-step explanation:
Force is the change in momentum per unit time
This relationship is equivalent to product of mass and acceleration
Thus F = Mass * acceleration
Substituting the given values in above equation we get -
F = 450 Kg * 1.2 m/s^2
F = 540 Kgm/s^2