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Vectors Question

This is the question:

Let u = -3i + j + k and v = mj + nk.

Given that v is a unit vector perpendicular to u, find the possible values of m and n.

All I have is m + n = 0 but the question is for 7 marks and I can't find anything else???

:eek::confused::colondollar:
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Avatar for Notnek
Notnek
21
Original post by Gmart
This is the question:

Let u = -3i + j + k and v = mj + nk.

Given that v is a unit vector perpendicular to u, find the possible values of m and n.

All I have is m + n = 0 but the question is for 7 marks and I can't find anything else???

:eek::confused::colondollar:

v is a unit vector - this means that it has magnitude 1. Can you make an equation using this?
Reply 2
Avatar for Gmart
Gmart
OP
13
Original post by Notnek
v is a unit vector - this means that it has magnitude 1. Can you make an equation using this?

Ah yes - I was trying to make something out of root 11, but the squares of m and n equal 1, thanks :smile:

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