I used first the conservation - of mechanical energy — there was no friction — and then I showed you that it's completely consistent with the work-energy theorem, so what would you do now?
And so you could have used the work-energytheorem or you can use the conservationof mechanical energy.
所以你也可以用,功能定理,或者是机械能,守恒定律。
3
Recent trends in the Lagrange equation's conversion and form from inertial system to non-inertial system, the application ofenergytheorem, energy conservation law, etc. are introduced.