Ch.11 Vectors Flashcards
what does it mean if PQ = RS?
pretend the PQ and RS have lil arrows above them this is to do with vectors
the line segments are equal in length, parallel and in the same direction
what does it mean if AB = -BA?
pretend the AB and -BA have lil arrows above them this is to do with vectors
the line segments are equal in length, parallel and opposite directions
what is a unit vector?
a vector with length of 1 and along either the x- or y-axes
what is a vector?
a displacement description relative to the x- and y-axes
how are column vectors written?
in brackets with change in x on top and change in y on bottom
how could the magnitude of a be written?
|a| = square root of x² + y²
what is a unit vector in the direction of a?
a
____
|a|
what is a position vector?
a displacement description of a point relative to the origin
