What is the Momentum of a 15 Ton Train Traveling at a Speed of 46.6 m/s?

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Homework Help Overview

The discussion revolves around calculating the momentum of a train, specifically a 15 metric ton train, and determining the necessary speed to achieve a specified momentum of 700,000 kg(m/s). The subject area includes concepts of momentum and its relationship with mass and velocity.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • The original poster attempts to calculate the velocity using the momentum formula and presents their calculation. Some participants question the validity of the result based on the context of the homework requirements.

Discussion Status

The discussion is ongoing, with participants exploring the implications of the calculated speed and the constraints imposed by the homework service. There is no explicit consensus, but suggestions for checking assumptions and potential typos have been raised.

Contextual Notes

KatieLynn
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Homework Statement



What speed must a 15 metric ton train travel to have a momentum of 700,000 kg(m/s)?


Homework Equations



Momentum = mass X velocity

change in momentum = mass(Finalvelocity - initialvelocity)

The Attempt at a Solution



I though you did it like this...

15 metric tons= 15,000 kg

so 700,000=15,000V

V=46.6 m/s
 
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That looks ok to me. Except if you report the answer to one decimal place you'll have to round it up.
 
Well see that's the problem, my teacher is having us enter our answers on to a university of Texas homework service site thing. So to help us not enter all wrong answers and get a horrible grade, he gave us a "range" for the answers of each problem, for that problem it says the answer is "a small positive integer 1-10"
 
Well the only thing i can suggest is that there is a typo somewhere. I assume you've checked the units it has to be entered in and everything.
 

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