Timeline for Can we add any two vectors?
Current License: CC BY-SA 3.0
33 events
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Sep 29, 2014 at 15:08 | comment | added | David Hammen | @User58220 - Nice find, but none of those three is published by Pradeep. They are all Indian, though (as is Pradeep). India apparently has rather lax copyright laws. There appears to be a lot of cut-and-paste across Indian textbook publishers. India also apparently has rather lax checking. The exact same question will appear in multiple books, but will sometimes have differing and conflicting answers. This could well the case here. | |
Sep 15, 2014 at 2:23 | comment | added | user13267 | To put it simply, you can only add quantities with the same units, example, weight to weight (or mass to mass), time to time, money to money, etc. It is the same thing with vectors. Acceleration and velocity are both vectors, but with different units, so should not be added. | |
Sep 15, 2014 at 0:18 | vote | accept | geek101 | ||
Sep 15, 2014 at 0:18 | vote | accept | geek101 | ||
Sep 15, 2014 at 0:18 | |||||
Sep 14, 2014 at 20:34 | answer | added | Fattie | timeline score: 3 | |
Sep 14, 2014 at 20:22 | comment | added | DJohnM |
FWIW: Searching in Google Books for state with reasons whether the following statements algebraic operations with scalar and vector quantities are meaningful produces three textbooks with the question in question...
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Sep 14, 2014 at 19:59 | history | edited | rob♦ |
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Sep 14, 2014 at 17:12 | comment | added | geek101 | the subject area is physics | |
Sep 14, 2014 at 16:39 | comment | added | David Hammen | Good gosh. Please give the title of the class, the subject area (mathematics or physics), and the title of the book. Predeep is an Indian publisher of many textbooks. Saying the book is Pradeep says nothing. | |
Sep 14, 2014 at 16:31 | comment | added | geek101 | @DavidHammen the chapter is motion in a plane class 11. book is pradeep | |
Sep 14, 2014 at 15:55 | comment | added | David Hammen | It would be very good if you clarified the question. I still suspect you are misreading. What is the name of the book? The name of the class? I suspect the answer to both questions is "Linear Algebra." | |
Sep 14, 2014 at 15:43 | answer | added | David Hammen | timeline score: 8 | |
Sep 14, 2014 at 15:35 | comment | added | geek101 | so can we add two vectors with different dimensions? @DavidHammen | |
Sep 14, 2014 at 15:31 | answer | added | fibonatic | timeline score: 0 | |
Sep 14, 2014 at 15:21 | comment | added | David Hammen | No, we can't think that. That is precisely the mathematical definition of a vector. Mathematicians and physicists disagree on what constitutes a "vector". More to the point, mathematicians do not worry about units. | |
Sep 14, 2014 at 15:16 | comment | added | geek101 | i think it is a misprint then? @DavidHammen | |
Sep 14, 2014 at 15:13 | comment | added | geek101 | clearly a and b are wrong my book says e is correct | |
Sep 14, 2014 at 15:12 | comment | added | geek101 | (A)adding any two scalars ,(b) adding scalar to vector of same dimensions ,(C)multiplying a vector by a scalar,(d)multiplying any two scalars, (e) adding any two vectors, (f) adding a component of a vector to the same vector | |
Sep 14, 2014 at 15:10 | comment | added | geek101 | state with reasons whether the following statements algebraic operations with scalar and vector quantities are meaningful- | |
Sep 14, 2014 at 15:09 | comment | added | geek101 | there is actually a question which is as follows- | |
Sep 14, 2014 at 15:06 | comment | added | David Hammen | A direct quote from your book would be nice. I suspect you are misreading. | |
Sep 14, 2014 at 15:05 | history | edited | geek101 | CC BY-SA 3.0 |
deleted 4 characters in body
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Sep 14, 2014 at 15:05 | comment | added | geek101 | sorry it was wrongly edited | |
Sep 14, 2014 at 15:03 | comment | added | David Hammen | I'm confused by your question and your comment to the first answer. You wrote that your book "says it is not true" (that one can add any two vectors), and the one answer so far says one cannot add an acceleration vector and a velocity vector. So what's the problem? What specifically is it that makes think there is a misprint in your textbook? | |
S Sep 14, 2014 at 15:00 | history | suggested | bobie | CC BY-SA 3.0 |
fixed some typos
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Sep 14, 2014 at 15:00 | review | Suggested edits | |||
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Sep 14, 2014 at 14:57 | answer | added | 299792458 | timeline score: 8 | |
Sep 14, 2014 at 14:55 | comment | added | lemon | en.wikipedia.org/wiki/Dimensional_analysis | |
Sep 14, 2014 at 14:54 | history | edited | Kyle Kanos | CC BY-SA 3.0 |
formatting
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Sep 14, 2014 at 14:53 | comment | added | dmckee --- ex-moderator kitten | What would it mean to have added acceleartion and velocity. What physical quantity could that possible correspond to. Note, however, theat these consideration have nothing to do with the scalar of vector nature of the quantities and everything to do with what the quantities are (i.e. units). | |
Sep 14, 2014 at 14:52 | comment | added | pfnuesel | Can you add 3 kg to 7 $? Why should that work for vectors? Or are you talking about polar and axial vectors? | |
Sep 14, 2014 at 14:52 | comment | added | HDE 226868 | It is correct that you cannot add velocity and acceleration, because they are different quantities with different units ($m/s$ and $m/s^2$). | |
Sep 14, 2014 at 14:49 | history | asked | geek101 | CC BY-SA 3.0 |