A recent discussion at iMechanica following my last post here [^] leads to this post. The context of that discussion is assumed here.
I present here three sample problems, thought of almost at random, just to see how the suggestions made by Jaydeep in the above post work out.
To the best of my knowledge, the two momentum conservation principles, namely, the conservation of linear- and angular-momentum, operate completely independent of each other. For an isolated object, there is no possibility of conversion of one form of momentum to the other.
Today, when I Googled on this topic, I found that most pages agree with my position above. Yet, to my great surprise, I did run into a page written by an engineer here [^] claiming that the linear momentum is only a special case of the angular momentum... Here is the relevant excerpt (bold emphasis mine):