Card 1 of 22
How does a vector differ from a scalar?
A
For non-zero a\mathbf{a}a, the unit vector in its direction is a^=a∣a∣\boxed{\hat{\mathbf{a}}=\frac{\mathbf{a}}{|\mathbf{a}|}}a^=∣a∣a.
B
OA→=(3−25)\overrightarrow{OA}=\begin{pmatrix}3\\-2\\5\end{pmatrix}OA=3−25
C
A vector has magnitude and direction; a scalar has magnitude only.
D
AC→=3AB→\overrightarrow{AC}=3\overrightarrow{AB}AC=3AB, so the vectors are parallel and share AAA; hence the points are collinear.
Card 1 of 22
1.13.1 Vectors in two and three dimensions Flashcards
22 flashcards on AQA A Level Maths 1.13.1 Vectors in two and three dimensions: the key formulae, methods and definitions you need to recall for Paper 1, Paper 2 and Paper 3.