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VCE Stuff => VCE Mathematics => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Specialist Mathematics => Topic started by: letsride on September 29, 2010, 02:23:10 pm

Title: vector calculus help
Post by: letsride on September 29, 2010, 02:23:10 pm

Two boats, A and B, have positions (in km) given by the coordinates (1,3) and (2,7) respectively. Boat A is travelling with the velocity 3i+5j km/h. Boat B sets off to meet boat A at time t=0. Both boats travel at the same speed.

a) when will the boats meet?
b) what is the velocity vector for boat B?

I'm kinda stuck =X

i worked out the position vectors for boat A and boat B, given the velocity is mi+nj  and m^2+n^2 = 34 since they travel at the same speed, and im kinda stuck now...

Title: Re: vector calculus help
Post by: supernatural on September 29, 2010, 05:36:19 pm

Hope this helps

Title: Re: vector calculus help
Post by: letsride on September 29, 2010, 05:43:31 pm

thank you :),
eeeh im so retarded had all the components but didnt think to equate them to one and solve :x