mass car 1 = 1200kg. v1 = ?
mass car 2 = 1500kg. v2 = 0
Combined mass (mC) after collision = m1 + m2 = 2700kg.
Velocity after (vC) after collision = 8ms^-1.
Apply m1v1 + m2v2 = mCvC, and solve for v1. (Law of Conservation of Momentum)
Impulse = Change in momentum = m(v-u) = 1500(8-0) =...