How much horizontal net force is required to accelerate 1000kg car at 2m/s?

Explanation:

You seem to have forgotten to include the numerical value of m/s^2, so I’ll call it X to demonstrate the method.

Newton’s Second Law states that F = dp(t)/dt where p = mv is momentum. For a system with constant mass, this equation reduces to the familiar form F = ma

In this case, m = 1000kg and a = Xm/s^2

So F = 1000X Newtons

Note that not all systems have constant mass; an accelerating rocket, for example, reduces mass as fuel is expended, so in that case,

F = mdv(t)/dt + vdm(t)/dt

im guessing the west of station b