Please help me with a physics problem (acceleration)?
A freight train has a mass of 1.7x10^7 kg. If the locomotive can exert a constant pull of 8.4x10^5 N, how long does it take to increase the speed of the train from rest to 84 km/h?
I've looked in my physics book and cant figure out what equations to combine to figure this out! help please
- Anonymous1 decade agoFavorite Answer
a = 0.0494 m/s^2
84km/hr / 3.6 = 23.33m/s.
a = (v_f-v_i)/t
t = 23.33/0.0494
= 472 seconds.