Converting kinetic energy into BTUs?


by dillonmhudson
Tags: btus, converting, energy, kinetic
dillonmhudson
dillonmhudson is offline
#1
Sep5-10, 04:01 PM
P: 50
1. The problem statement, all variables and given/known data
"A body whose mass is 2lb experiences an increase in velocity from 20 ft/s to 50 ft/s.
Determine the change in kinetic energy in BTUs"


2. Relevant equations
----


3. The attempt at a solution

As of right now I have [tex]\Delta[/tex]KE=2100 lb_m ft^2/s^2

I don't know how to change that into BTUs. I don't even know what BTUs are.
For example a joule is a kg*m/s^2, so what is a BTU in terms of pounds mass?

Thanks for any help
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mplayer
mplayer is offline
#2
Sep6-10, 03:09 AM
P: 154
You could just try converting the 2 lb. mass into kg. and the two velocities given into m/s so that solving for the change in kinetic energy would be in Joules. Should be pretty easy to find those three conversion factors.
dillonmhudson
dillonmhudson is offline
#3
Sep6-10, 07:37 AM
P: 50
ok, yeah i guess i could do that.
Thanks!


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