1. The problem statement, all variables and given/known data A drunk driver strikes a parked car. During the collision the cars become entangled and slide to a stop together. The drunk driver's car has a total mass of 742 kg, and the parked car has a total mass of 776 kg. If the cars slide 18 m before coming to rest, how fast was the drunk driver going? The coefficient of sliding friction between the tires and the road is 0.59. 2. Relevant equations Err? 3. The attempt at a solution Not any idea really? Just that I think its inelastic... and that I cant use the equation v1`=m1-m2/m1+m2 V1 to get the answer... How do I incorporate the friction?