11.1 (vectors) Flashcards
1
Q
What is a position vector?
A
A vector from the origin
2
Q
What is a unit vector?
A
A vector whose magnitude is one
3
Q
Give the perpendicular unit vectors
A
xi +yj
/ 5 = 5i-4j
-4 /
4
Q
How do you find the magnitude of a vector and how is it written?
A
Pythagoras (a^2=b^2+c^2)
written |a|
e.g. a=3i+4j
|a|=5
5
Q
How do you find the unit vector of a given vector?
A
a/ |a|
6
Q
A
