Herman Trivilino's latest activity
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The two forces acting on the ends of the string are not a Newtons Third Law pair. -
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So far nobody formalized it, so let it be me. Let me denote the mass on the left as ##m_1## and the mass on the right as ##m_2##. The...
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Just replace string with spring in the argument. If the spring moves freely, it measures 0. If held stationary, it measures the force -...
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Herman Trivilino replied to the thread B Simple mass/scale puzzle.That is part of the pedagogical point of the original scenario, the other part requires a device for measuring that force. I've seen...
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Going with this idea, consider two rockets with equal thrust pulling on both end of a string. This presents the same ‘seeming’...
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Herman Trivilino replied to the thread B Simple mass/scale puzzle.Because the formula applies to each instance.
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Herman Trivilino replied to the thread B Simple mass/scale puzzle.This is what you said: I don't see that as talking past each other. It's you contradicting yourself. The scale either reads 3 lb or it...
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Herman Trivilino replied to the thread B Simple mass/scale puzzle.##F=mg=(10 \mathrm{kg})(9.8 \mathrm{N/kg}) \approx 100 \mathrm{N}##
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Herman Trivilino replied to the thread B Simple mass/scale puzzle.Nope. I've done this demonstration for students many many times. What difference does it make what pulls with 3 lb of force? It could...
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Herman Trivilino replied to the thread B Simple mass/scale puzzle.Is that not also true of the two alternate scenarios I described in Post #7? Do you honestly believe that when you hang 3 lb of bananas...
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Herman Trivilino replied to the thread B Simple mass/scale puzzle.Did you not read Post #7?
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Herman Trivilino replied to the thread B Simple mass/scale puzzle.It appears in Paul G. Hewitt's famous "Next Time Questions". In the instructor's guide, which accompanies his Conceptual Physics...
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Herman Trivilino replied to the thread B Simple mass/scale puzzle.I don't see it as an alternate explanation. Once you go through the sequence of scenarios associated with each situation shown in the...
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Herman Trivilino replied to the thread B Simple mass/scale puzzle.Suppose you eliminate the pulley on the left and tie the cable to a fixed block resting on the table top, as shown in the figure below...
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