- #1
katielouise
- 4
- 0
I have the following question:
Given that ø = (x^2)y + cos(z) find the unit vector n which is both tangent to the surface of constant ø at (1,1,∏/2) and normal to the vector b = x + y - 2z (where x y and z are the unit vectors)
I have calculated ∇ø = 2x + y - z (again where x y and z are the unit vectors)
but I am unsure what to do next.
If I want the unit vector tangent to this surface then its gradient has to be the same as what I calculated above? And if its normal to b then n dotted with b has to = 0? Just don't know how to use this information or anything else to actually calculate the unit vector n.
Thanks :)
Given that ø = (x^2)y + cos(z) find the unit vector n which is both tangent to the surface of constant ø at (1,1,∏/2) and normal to the vector b = x + y - 2z (where x y and z are the unit vectors)
I have calculated ∇ø = 2x + y - z (again where x y and z are the unit vectors)
but I am unsure what to do next.
If I want the unit vector tangent to this surface then its gradient has to be the same as what I calculated above? And if its normal to b then n dotted with b has to = 0? Just don't know how to use this information or anything else to actually calculate the unit vector n.
Thanks :)