Lagrangian Multipliers - Force of Constraint for a Mass on an Incline 

I like that you do things in different ways, ending up with the same thing. I think it's interesting and enlightening.

I like it very much!

hi, can you please do a video comparing and possibly simulating the physics of gun fired when fixed to ground and gun fired when free falling. The question is whether the exit velocity of bullet remains same. your videos really improved my basics in physics