Plz tell me Which is correct form of Work Energy theorem 1. Total Work = Toatl change in Mechanical Energy(Potental + Kinetic) 2. Total Work + Potential Energy = Total Change in Kinetic Energy 3. Total Work = Total Change in Kinetic Energy (Mention in the text books) Actually i am confused when i prove Bernoulli Theorem for fluid. Some writers use Total Work done(Due to pressure) + Change in Potential Energy = Change in Kinetic Energy I think the expression is this one Total Work done(Due to pressure) = Total Change in Mechanical Energy(Potential Energy + Kinetic Energy)
If mechanical energy is conserved , then you have : T1+ V1 = T2+V2 (T: kinetic energy, V: potential energy) It can be written as T2-T1=V1-V2=>DT=-DV Thus the potential energy diminishes. The amount of change in the potential energy is the work done, which is finally converted in kinetic energy, thus increasing its value.