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## Homework Statement

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?

## Homework Equations

(mass*velocity)/time=force

## 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.