I also noticed how there was no mention of skid marks by the debris in the information given by the problem. I thought that meant friction had taken its course and the vehicles may have stopped to a point, which didn't make much sense. Momentum seems to be the best way to solve the problem...
Homework Statement
You are called to the site of a collision between a small car and a half ton truck on a lonely country road. You are given the following information:
a) On clean dry pavement at a temperature of 20 C, the coefficient of kinetic friction is 0.600 on locked wheels.
b)...