Ok, so, here we have that the mass of the car is 2500kg, right?
If we apply Newton's second law, we have that Force (F) is equal to Mass(m), per acceleration(a).
So, the equation we are going to use will be: F=ma.
The question ask us to know how much force is required, so we replace in the equation:
F= (2500kg)(1.5m/s2). Notice that the unit of F is Newtons, (Kg.m/s2).
We multiply and we obtain:
F=3750Kg.m/s2, which is equal to 3750N.
Then, the force required to accelerate the car at a rate of 1.5m/s2 is 3750N.
:)