Posted by **DAE** on Monday, October 29, 2012 at 7:06pm.

A freight train has a mass of 1.6 × 10

7

kg.

If the locomotive can exert a constant pull

of 8.0 × 10

5

N, how long would it take to

increase the speed of the train from rest to

80.3 km/h? Disregard friction

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