jbriggs444's latest activity
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jbriggs444 replied to the thread B Interstellar asteroids.For a transit that follows the rotational axis of the two star system, there is no possibility of a slingshot. We are told that this is... -
jbriggs444 replied to the thread Definition of pound force.The direct answer is that I know of no picture or video demonstrating a 32 pound weight being accelerated at 1 foot per second per...
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jbriggs444 replied to the thread Definition of pound force.Are you trying to convince yourself? Or a third party doubter? How direct does the proof need to be?
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jbriggs444 replied to the thread B Interstellar asteroids.Ahhh, my mistake. I visualized all motion in the plane of the page. Your way restores the symmetry.
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For a given velocity magnitude, there can be up to two angles to hit a target. This was used in naval warfare to land 2 full salvos...
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jbriggs444 replied to the thread B Interstellar asteroids.We are given initial speed and position. We can assume a perfect circular orbit of the stars about each other. A quick look at the...
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jbriggs444 replied to the thread B Work done when moving an object.It is hard to understand exactly what you are talking about here. It sounds like you have a particular destination point in mind. A...
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Objects "experiencing gravity", whether in freefall or not, is not part of the theory of general relativity; it's a misunderstanding...
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I know what you're trying to say but the figure doesn't look right. I assume that the vertical scale is attached to the horizontal...
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jbriggs444 reacted to DaveC426913's post in the thread Is this an oversimplification? (treating a lens as a set of prisms) with
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Sure. It's a simplification. Three is less than infinity. Is it an oversimplification? Only if it is too simple to teach the desired... -
Because it's an error made in virtually every introductory physics textbook and classroom. The so-called Treaty of the Meter was signed...
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jbriggs444 replied to the thread B Simple mass/scale puzzle.I share the same sentiment as @Mister T. Because it is not always an error. We (as scientists and physics students) need to avoid the...
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True in the world of physics and engineering, which is indeed where we are right now as we participate in this forum. But by...
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The ##\mathrm{SI}## unit of force is the newton. Weight is defined in physics and engineering differently than in international treaty...
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There are so many posts in this thread, I apologize if I am repeating things. There are two forces in this problem. There is also 1...