A freight train has a mass of 1.8 x 10^7 kg. If the locomotive can exert a constant pull of 6.5 x 10^5 N, how long does it take to increase the speed of the train from rest to 84 km/h?
_______ min
A 64-kg man standing on a scale in an elevator notes that the elevator rises, the scale reads 827 N. What is the acceleration of the elevator?
_______m/s^2 upward