Question

A car starts from rest at a stop sign. It accelerates at 4.0 m/s^2
for 6.0 s, coasts for 2.0 s, and then slows down at a rate of
3.0 m/s^2 for the next stop sign. How far apart are the stop signs?

Answer 1

Section 1:
v = at

d = vt

Section 2:
dx = vt

Add section 1 + section 2

Section 3:
v = vi + at
dx = vt