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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)

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# Work Energy Theorem

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