1500 kg car increases its speed by 2 m/s for each second of travel. What is the net force acting on the car?

You have said that the car's mass is 1,500 kg, and its acceleration is 2 m/s².

This information leads directly to the net force on the car,

by way of Newton's 2nd law of motion:

Force = (mass) x (acceleration)

Force = (1,500 kg) x (2 m/s²) = 3,000 kg-m/s² = 3,000 newtons