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
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.