Homework Help: physics

Posted by jena on Sunday, January 9, 2011 at 5:38pm.

A freight train has a mass of 3.2 × 107 kg.
If the locomotive can exert a constant pull
of 7.1 × 105 N, how long would it take to
increase the speed of the train from rest to
74.6 km/h? (Disregard friction.)

physics - bobpursley, Sunday, January 9, 2011 at 5:40pm
change the speed to m/s

F=ma

F=m (change in velocity/time)
F=m * Vfinal/time
solve for time.

Answer this Question

Related Questions

Physics - A freight train has a mass of 1.2 107 kg. If the locomotive can exert ...
Physics - A freight train has a mass of 1.7 107 kg. If the locomotive can exert ...
physics - A freight train has a mass of 1.4 107 kg. If the locomotive can exert...
physics - A freight train has a mass of 1.5 107 kg. If the locomotive can exert ...
physics - A freight train has a mass of 1.2 107 kg. If the locomotive can exert ...
physics - A freight train has a mass of 1.9 107 kg. If the locomotive can exert ...
physics - A freight train has a mass of 6.5 107 kg. If the locomotive can exert ...
physics - A freight train has a mass of 5 x 107 kg. If the locomotive can exert ...
physics - A freight train has a mass of 3.1 × 107 kg. If the locomotive ...
physics - A freight train has a mass of 1.5 × 107 kg. If the locomotive ...

For Further Reading

First Name:
School Subject:
Answer: