- #1
ZedCar
- 354
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Homework Statement
If (3,2,2) are the Cartesian components of vector a and (2,2,1) are the Cartesian coordinates of a point Q, calculate the distance of a plane through point Q and normal to vector a from the origin.
State whether the plane is in the direction of a from the origin or not.
Homework Equations
(° = dot product)
p = n̂ ° r
The Attempt at a Solution
a = (3,2,2)
therefore magnitude of a = √17
unit vector of a = 1/√17 (3,2,2)
p = n̂ ° r
p = 1/√17 (2,2,1) ° (3,2,2)
p = 1/√17 (6,4,2)The second part of the question above asks "State whether the plane is in the direction of a from the origin or not." Wasn't sure how to do this. If the question was about them being orthogonal I'd have used dot product = 0.
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