11. vectors Flashcards
what does vectors have
magnitude and direction
what do scalar quantities have
only magnitude
what do you do to a vector when you multiply by a scale
multiply each component
what do you do when you add to a column vector
you add to each component
unit vector
represent vector in 2 dimensions along x and y axis usually denoted by I and j respectively
column vector is described by
a change in position or displacement relative to x and y axis
how to find the magnitude of vector
ex xi + yj
I a I = root x^2 + y^2
magnitude direction form
when you define by giving its magnitude and the angle between the vector and one of the coordinate axis
position vector are
vectors giving position relative to a fixed origin
vector quantities 3
velocity
displacement
force
scalar quantties 2
speed
distance
distance =
speed x time