jbriggs444's latest activity
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jbriggs444 replied to the thread B The work done by two objects on each other.Yes. In this case the force pair is not dissipative. The two works are equal and opposite. Yes. Agreed. Yes. Agreed. Good. Then we... -
jbriggs444 reacted to PeroK's post in the thread Variable Mass system : Sand falling into a Freight car with
Like.
Just to emphasise the point that in Newtonian physics, mass cannot be created or destroyed. Newton's second law, therefore, applies to... -
jbriggs444 replied to the thread B The work done by two objects on each other.As I use the terminology, the result can be negative. Perhaps I should explain the way I use the terms. I use both terms in a single...
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jbriggs444 replied to the thread B The work done by two objects on each other.We are still working toward a meeting of the minds. Your insistence on adding complications at every turn is not helpful in achieving...
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The only way I ever edit.
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jbriggs444 replied to the thread B The work done by two objects on each other.Which displacement? Perhaps you should read what I have written in this thread. And no. Generalized work includes other forms of energy...
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jbriggs444 replied to the thread B The work done by two objects on each other.Not necessarily. @PeroK had pointed this out in post #2 in the thread. It holds true for two objects (or interacting surfaces) with...
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jbriggs444 reacted to A.T.'s post in the thread B The work done by two objects on each other with Like.
Just because we survived some bad teachers, doesn't mean we have to propagate bad teaching.
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jbriggs444 replied to the thread B The work done by two objects on each other.Without using "on" or "by", do you have a concrete proposal to distinguish between the work done by A on B and the work done by B on A...
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jbriggs444 replied to the thread B The work done by two objects on each other.That is a problem with correctly choosing which displacement one is talking about. I advocate being explicit and clear on this point. My...
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jbriggs444 reacted to Herman Trivilino's post in the thread B The work done by two objects on each other with Like.
Well, I have been a full-time college-level physics instructor for 34 consecutive years and what you imagine is true for the vast...
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jbriggs444 replied to the thread B The work done by two objects on each other.We can agree that choosing badly between the force of A on B and the force of B on A has the same effect as muffing a sign convention...
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jbriggs444 replied to the thread B The work done by two objects on each other.You seem to have a problem with using the words "on" and "by" when speaking of the work done by a force. As if the distinguishing...
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jbriggs444 replied to the thread B The work done by two objects on each other.You have already debunked yourself by using the definite article, "the". We use "on" and "by" because for every interaction force there...
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jbriggs444 reacted to sophiecentaur's post in the thread B The work done by two objects on each other with
Skeptical.
So why use 'on or by'? The work is already determined by the sign you have chosen and that will determine the behaviour (acceleration /...