ATAR Notes: Forum

VCE Stuff => VCE Mathematics => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Specialist Mathematics => Topic started by: Andiio on January 01, 2011, 02:41:43 pm

Title: Vector question - help would be appreciated!
Post by: Andiio on January 01, 2011, 02:41:43 pm

Why does the addition of those 2 vectors bisect theta?

Am I missing something simple? :S

Thanks!

Title: Re: Vector question - help would be appreciated!
Post by: Mao on January 01, 2011, 02:43:03 pm

Draw parallelogram. :)

I meant rhombus. Note that both are unit vectors.

Title: Re: Vector question - help would be appreciated!
Post by: Andiio on January 01, 2011, 02:43:55 pm

Quote from: Mao on January 01, 2011, 02:43:03 pm

Draw parallelogram. :)

Consider myself FACEPALM'D LOL.

Thanks Mao!
It's just the diagonal of the parallelogram, right?

Title: Re: Vector question - help would be appreciated!
Post by: Mao on January 01, 2011, 02:46:57 pm

Quote from: Andiio on January 01, 2011, 02:43:55 pm

Quote from: Mao on January 01, 2011, 02:43:03 pm

Draw parallelogram. :)

Consider myself FACEPALM'D LOL.

Thanks Mao!
It's just the diagonal of the parallelogram, right?

Yes, the diagonal is the sum, but bisection is only for
Rhombus*, this only works if they have the same magnitude (which is true in this case, both are unit vectors)

If they have different magnitudes, you''re more or less fucked :P

Title: Re: Vector question - help would be appreciated!
Post by: Andiio on January 01, 2011, 02:49:26 pm

Quote from: Mao on January 01, 2011, 02:46:57 pm

Quote from: Andiio on January 01, 2011, 02:43:55 pm

Quote from: Mao on January 01, 2011, 02:43:03 pm

Draw parallelogram. :)

Consider myself FACEPALM'D LOL.

Thanks Mao!
It's just the diagonal of the parallelogram, right?

Yes, the diagonal is the sum, but bisection is only for
Rhombus*, this only works if they have the same magnitude (which is true in this case, both are unit vectors)

If they have different magnitudes, you''re more or less fucked :P

Haha yeah *rhombus. Thanks Mao!

..Hoping it doesn't come to that. :P