If a system has an internal energy of 540 Btu a kinetic ene

If a system has an internal energy of 54.0 Btu , a kinetic energy of 1750 ft-lbf , and a potential energy of 1430 ft-lbf , what is the total energy of the system

Solution

Internal energy = 54.0 Btu

1 ft-lbf = 1.285*10^-3 Btu

KE = 1750 ft-lbf = 2.248 Btu

PE = 1430 ft-lbf = 1.837 Btu

Total Energy = IE + KE + PE

TE = 54 + 2.248 + 1.837 = 58.085 Btu