janelavis
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Reply #30 on: September 22, 2009, 01:50:31 pm » posted from:Phagwara,Punjab,India |
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 I think that you need to think a little more about the design of your Vector class. You need to decide upon a minimal but complete interface for Vector. It looks like you could do with some member variables instead of creating local variables named size and degree
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Fu-Kwun Hwang
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Reply #31 on: October 05, 2009, 10:59:25 am » posted from:Taipei,T\'ai-pei,Taiwan |
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 Thank you for your comment. I am not a professional programmer. I am a physicist , I enjoy the fun of physics and I hope the simulations I have created can help users to enjoy the fun of physics, too! I hope you can create better simulation to help other, too! :-) You are welcomed to upload it here and share with others.
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wenouyang
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Reply #32 on: May 14, 2010, 09:52:14 pm » posted from:Livonia,Michigan,United States |
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 Hello, Professor Hwuang, Would you please send me the Java code for this version of vector addition? I like your work and it illustrated the concept clearly! Thank you! Wen
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Fu-Kwun Hwang
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Reply #33 on: May 20, 2010, 05:19:42 pm » posted from:Taipei,T'ai-pei,Taiwan |
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 The source code is available as attached file. Please download it by yourself. 
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faran
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Reply #34 on: July 06, 2011, 03:34:59 am » posted from:-,-,PAKISTAN |
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 Hi folk, I need help. I encountered a question in my high school exam that was " The resultant of two anti-parallel vectors A and B is: 1) A+B2) A-B " What is the correct answer? I was told that it is A-B, but how could it be A-B, when resultant it self means that it is bascially the addition of two vectors. If B vector is anti to A, then it should be -B as convention, but what if we say that - B= CThen it becomes A+C, means we have to add them both to get answer. I'm stuck please help me out.
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Fu-Kwun Hwang
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Reply #35 on: July 06, 2011, 06:28:00 pm » posted from:Taipei,T'ai-pei,Taiwan |
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 two anti-parallel vectors  and  means  The sum of two vectors  and  is 
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faran
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Reply #36 on: July 07, 2011, 03:05:59 am » posted from:-,-,PAKISTAN |
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 Thanks for the response. But what if the two vectors are of different magnitude and are anti parallel. Then infact we'll have to subtract their magnitudes that will be |A-B| , but what if we want to write them in vector form, what would we write them if we want to get resultant? A-Bor A+BSome people told me that as they are anti-parallel, then their resultant will be ultimately A+( -B), i.e A-BOne of my friend argued that the resultant should be A+B because Let two vectors A and B, A= |A| ( k ) B= |B| (- k) Now Resultant: A + ( -B) [|A| (k)] + [|B| (-k)] As |B|(-k)= Bso A + B---- Now if it is A+B, then it means that they would be added to each other, and their magnitutude should also be added? Please do try to understand what I've written, and help me. Waiting for the reply
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faran
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Reply #37 on: July 08, 2011, 02:57:45 am » posted from:-,-,PAKISTAN |
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Fu-Kwun Hwang
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Reply #38 on: July 08, 2011, 04:32:35 pm » posted from:Taipei,T'ai-pei,Taiwan |
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 The sum of two vectors is always  . For example: if  (1.0-0.2) if  , two vector are parallel.  (1.0+0.2)
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THERITESHBABA
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Reply #39 on: January 02, 2012, 12:35:36 pm » posted from:Kolkata,West Bengal,India |
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 if the angle between two vectors is a & b is @ and angle between vectors a+ b and a is O then tan@=(bsinO )/(a+bcosO ) now tan2 @=(bsinO)2/(a+bcosO)2 now tan2@= sec2@ -1
and sec2@ =1/cos2@ {a2 sec2O + b2 + 2absecO} so cos 2@= ____________________________________________________________________ {a2sec2O + b2sec2O + 2absecO} if @ =0 b2=b2cos2O O=0 if @ =90 a=-bcosO if O=90 -b2 tan 2@= ____ a2+b2  HERE BOLD CHARACTERS REPRESENT VECTORS.
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« Last Edit: January 02, 2012, 01:45:26 pm by THERITESHBABA »
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THERITESHBABA
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Reply #40 on: January 02, 2012, 01:48:13 pm » posted from:Kolkata,West Bengal,India |
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 if the angle between two vectors is a & b is @ and angle between vectors a+b and a is O then tan@=(bsinO )/(a+bcosO ) now tan2 @=(bsinO)2/(a+bcosO)2 now tan2@= sec2@ -1 and sec2@ =1/cos2@ {a2 sec2O + b2 + 2absecO} so cos2@= {a2sec2O + b2sec2O + 2absecO} if @ =0 b2=b2cos2O O=0 if @ =90 a=-bcosO if O=90 -b2 tan2@= _________________ a2+b2
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nateuer
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Reply #41 on: November 17, 2012, 09:42:01 pm » posted from:Dhaka,Dhaka,Bangladesh |
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 -*- I have just seen it,nice I love that.
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koclup1580
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Reply #42 on: December 29, 2012, 01:13:07 pm » posted from:,,Satellite Provider |
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 thanks
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