1. The problem statement, all variables and given/known data A freight train has a mass of 1.2e+7 kg. If the locomotive can exert a constant pull of 8.4e+5 N, how long does it take to increase the speed of the train from rest to 82 km/h? 2. Relevant equations (mass*velocity)/time=force 3. The attempt at a solution (1.2e+7 * 82)/h = 8.4e+5 i solved for h h = (8.4e+5)/(9.84e+8) h = 8.54e-4 then i had to convert from hours to min. 8.54e-4*60 so i got 5.1e-2 min this is my first time posting on this forum so i hope i followed the right format.