pjhirv's latest activity
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pjhirv replied to the thread B Newton's first law?.Yes, you got it. Gongrats! -
pjhirv replied to the thread B Newton's first law?.No, you understood me wrong again. I'm not talking about the physicist. I am talking about the students, great majority of them won't...
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pjhirv replied to the thread B Newton's first law?.No, that's not the point. The point is that I think of these things now when I got the time. So I don't need to use the time in the...
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pjhirv replied to the thread B Newton's first law?.Here's a good example of two different interpretations. Other ones defines the law with zero net force, and the other one says the...
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pjhirv replied to the thread B Newton's first law?.I didn't mean that they actually read the Principia. But maybe someone hundreds years before them did read it, and made own...
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pjhirv replied to the thread B Newton's first law?.I agree that Principia shouldn't be red like gospel. That is very true, but unfortunately lots of people still do it. And sometimes...
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See my post #2 about a more modern interpretation. In an inertial frame of reference an object obeys Newton's first law. The danger, as...
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pjhirv replied to the thread B Newton's first law?.Interesting article about Newton's first law...
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pjhirv replied to the thread B Newton's first law?.I must explain that I'm a teacher myself, so that's why I want to be so extremely sure about the form of the law :smile: Thank you...
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pjhirv replied to the thread B Newton's first law?.I found different physics textbook quotes about Newton's first law. And it seems that they are very different. Physics for Scientists...
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pjhirv replied to the thread B Newton's first law?.In Principia Newton is giving examples of the movement of planets and comets right after the first law. And those things aren't isolated...
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In newtonian physics, the 1st Law describes bodies that are not accelerating. There is no net external force acting on it. There...
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It makes no difference. I guess, if you were starting at the beginning, then the body would have no forces acting on it. After you've...
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If you want the "real" answer (which you probably don't), then I refer you to Newton's Principia and suggest that you start reading at...
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People routinely use the phrases "no force", "zero force", "no net force", "zero net force" interchangeably so those are, within the...
