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

[KatieLynn]

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

 

[Kurdt]

That looks ok to me. Except if you report the answer to one decimal place you'll have to round it up.

 

[KatieLynn]

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"

 

[Kurdt]

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.