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

by Fanjoni
Tags: freight, mass, train
Fanjoni is offline
Oct16-06, 10:55 PM
P: 11
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?

I know u need to use F=ma but how do i find time
Phys.Org News Partner Science news on Phys.org
NASA's space station Robonaut finally getting legs
Free the seed: OSSI nurtures growing plants without patent barriers
Going nuts? Turkey looks to pistachios to heat new eco-city
gunblaze is offline
Oct16-06, 10:59 PM
P: 186
Think! What are you trying to find by using F=ma? Clue: You do need to use a little kinematics in this qn. If u have acceleration, final velocity and initial velocity, how are you goin to find time?
civil_dude is offline
Oct17-06, 12:29 PM
P: 180
Also remember to use the correct units, i.e. don't use km/hr.

Register to reply

Related Discussions
Einstein's train - When+where does side observer see lightnings to the train rider? Special & General Relativity 7
Freight Car Collision Introductory Physics Homework 1
freight elevator efficiency? Mechanical Engineering 2
need help w/ Acceleration of a Freight Train problem Introductory Physics Homework 1
Freight car velocity Introductory Physics Homework 3