According to Newton`s law. Force exerted by car,
[tex]F = m a = 1100 kg \times 2 m/s^2 = 2200 \ N[/tex]
After adding an additional 400 kg of mass, the force will be same therefore the acceleration
[tex]F = 2200 \ N = (1100 \ kg + 400 \ kg) a \\\\ a = \frac{2200 \ N}{1500 \ kg} = 1.47 \ m/s^2[/tex]
Thus, the acceleration after adding the masses is 1.47 \ m/s^2.
