how much is the net force required to accelerate 1000kg of a car in 5mins/sec?
If you provide the acceleration rate (a) in m/s^2 units, the force is
F = M a.
F is the force in Newtons and M is the mass in kg.
5 min/sec is not an acceleration rate. It is an incorrect time conversion factor.
5 meters/sec^2 IS an accleration rate.
These are things you should know if you are studying mechanical engineering.