
#1
Sep510, 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 



#2
Sep610, 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.




#3
Sep610, 07:37 AM

P: 50

ok, yeah i guess i could do that.
Thanks! 


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