A freight train has a mass of 4.5*10^7 kg. If the locomotive can exert a constant pull of 15*10^5 N, how long would it take to increase the speed of the train from rest to 85 km/h?(adsbygoogle = window.adsbygoogle || []).push({});

I know u need to use F=ma but how do i find time

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# A freight train has a mass of 4.5*10^7 kg

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