# C4 Vectors

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• Created by: Tassillow
• Created on: 28-05-16 18:48
What is a vector in the opposite direction a?
-a
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What is a vector parallel to a?
ta where t is a non-zero constant
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What is the unit vector in the x direction?
i
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What is the unit vector in the y direction?
j
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What is the unit vector in the z direction?
k
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What is the other word for magnitude?
Modulus
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What is the modulus of xi+yj+zk?
sqrt(x^2+y^2+z^2)
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What is the form xi+yj+zk? is written in?
Cartesian
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What two forms can vectors be written in?
Cartesian component vector & Column matrix vector
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What is a vector?
A quantity with both magnitude and direction
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When is a vector perpendicular?
When a.b=0
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When is a vector parallel?
When a.b=|a|*|b|
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How do you calclate a.b?
a1b1+a2b2+a3b3
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What is the equation for a vector parallel to b and passing through point A?
r=a+tb
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What is the equation for a vector passing through points C and D?
r=c+t(d-c)
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What is the equation for the angle between two vectors?
cosx=|(a.b)/(|a|*|b|)|
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## Other cards in this set

### Card 2

#### Front

What is a vector parallel to a?

#### Back

ta where t is a non-zero constant

### Card 3

#### Front

What is the unit vector in the x direction?

#### Back ### Card 4

#### Front

What is the unit vector in the y direction?

#### Back ### Card 5

#### Front

What is the unit vector in the z direction?

#### Back 