Video Transcript
Find the magnitude of the vector 𝐯
shown on the grid of unit squares below.
Any vector, in this case 𝐯, can be
written in terms of its 𝑥- and 𝑦-components. Any vector will have an initial or
start point and a terminal or endpoint. To get from the initial point to
the terminal point, we move one unit right and two units up. This means that vector 𝐯 is equal
to one, two. The magnitude of any vector is
denoted by absolute value bars. The magnitude is equal to the
length of the line segment and can be calculated by finding the sum of the squares
of the 𝑥- and 𝑦-components and then square rooting the answer. In this question, the magnitude of
vector 𝐯 is equal to the square root of one squared plus two squared. One squared is equal to one, and
two squared is equal to four. This means that the magnitude of
vector 𝐯 is equal to the square root of five.
