physics
posted by Anonymous .
A freight train has a mass of 6.5 107 kg. If the locomotive can exert a constant pull of 11.5 105 N, how long would it take to increase the speed of the train from rest to 85 km/h?
s

netforce= totalmass*acceleration
find acceleration
then
vf=vi+at solve for t.
(change km/hr to m/s)