A system of mass 12 kg undergoes a process during which there is no work, the elevation decreases by 50 m, and the velocity increases from 15 m/s to 40 m/s. The specific internal energy decreases by 5 kJ/kg and the acceleration of gravity is constant at 9.8 m/s. Determine the change in kinetic energy, in kJ, and the amount of energy transfer by heat for the process, in kJ. Step 1 Determine the change in kinetic energy, in kJ. AKE 12 = i kJ