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Help relative velocity!

Hi!:smile: How would I go about this question using the method of expressing the original data as i-j vectors? I hate drawing vector diagrams..
Reply 1
Original post by marinacalder
Hi!:smile: How would I go about this question using the method of expressing the original data as i-j vectors? I hate drawing vector diagrams..


What question?
tsr.jpg
Original post by Zacken
What question?
Reply 3
Original post by marinacalder
tsr.jpg
That is heck of a question
Original post by Zacken
What question?


Is this method totally wrong? I keep getting 3.8km hr while the book says 4.55...tsr2.jpg
Original post by marinacalder
Is this method totally wrong? I keep getting 3.8km hr while the book says 4.55...


VM=(04)\displaystyle V_M=\binom{0}{-4}
Original post by ghostwalker
VM=(04)\displaystyle V_M=\binom{0}{-4}


You've been so helpful to me across posts! Thank you so much!

So is my method okay? Can I always solve a vector problem by resolving into i,j,k components?
Original post by marinacalder
You've been so helpful to me across posts! Thank you so much!

So is my method okay?


Not checked the details, but if you got the right answer, then you're almost certainly doing it via a sound method.


Can I always solve a vector problem by resolving into i,j,k components?


I would hesitate to say always. It may be true, but could lead to some nasty algebra compared with a geometric approach, particularly with closest approach problems (don't know off hand what module that's in).

I would consider it important to get to grips with the diagrams/geometry.

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