Newton's Second Law of Motion:

* Force (F) = Mass (m) x Acceleration (a)

Given:

* Mass (m) = 900 kg

* Acceleration (a) = 3 m/s²

Calculation:

* Force (F) = 900 kg * 3 m/s² = 2700 N

Therefore, the force required to accelerate the car is 2700 N.