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Work and heat are obviously quite distinct because the Entropy
Balance has Q but not W in it.
I agree: The words "A block slides along a table" are insufficient to
understand what the problem is.
Hey don't get me involved with a spurious thing called "pseudowork". I
disavow ever using the term out loud. There is enough nonsense in physics
teaching without introducing yet more.
Recognizing that work and pseudowork are two different
concepts is useful. But why not to say that F*ds is work
and W from the first law is "pseudowork?" We teach about
F*ds before we teach the First Law. It would be silly to
introduce the name "pseudowork" to students who are not
familiar with the concept of work.