1. The problem statement, all variables and given/known data A 1250 kg car moving with a speed of 28.1 m/s collides head on with a railroad car of mass 2.5 * 10^4 kg moving with a speed of 3.00 m/s The car becomes attached to the railroad car in the collision IF the collison takes 0.952 s what was the average force on the car in N ? 2. Relevant equations F avr. = pf - Pi / t 3. The attempt at a solution I am fine with every thing, but my problem is calculation ?? I did that and got 211.2 N Is that Right ?