A stainless steel sphere has a mass of 2.2 lb. It is subjected to a process during which its velocity increases from 10 m/s to 40 m/s and its original elevation of 100m decreases to half of it. During the process 40 kJ of heat is transferred from the sphere, while the sphere receives energy in the form of work equal to 20kcal. calculate the change in the sphere's internal energy in kJ.