8 Find a vector of length: (2) (+) 3 a 10 units which is perpendicular to (a -4 b 3/2 units which is perpendicular to - -2 c V20 units which is perpendicular to -1 |

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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**Problem 8: Vector Length and Perpendicularity**

Find a vector of length:

**a.** 10 units which is perpendicular to \(\begin{pmatrix} 3 \\ -4 \end{pmatrix}\)

**b.** \(3\sqrt{2}\) units which is perpendicular to \(\begin{pmatrix} 1 \\ -1 \end{pmatrix}\)

**c.** \(\sqrt{20}\) units which is perpendicular to \(\begin{pmatrix} -2 \\ -1 \end{pmatrix}\)

In this problem, you are tasked with finding vectors with specified lengths that are perpendicular to given vectors. Perpendicular vectors, or orthogonal vectors, have a dot product of zero. The dot product of two vectors \(\begin{pmatrix} a \\ b \end{pmatrix}\) and \(\begin{pmatrix} c \\ d \end{pmatrix}\) is defined as:

\[ a \cdot c + b \cdot d = 0 \]

When asked to find a perpendicular vector of a certain length, you must determine a vector that holds this property and also has the specified magnitude (length).
Transcribed Image Text:**Problem 8: Vector Length and Perpendicularity** Find a vector of length: **a.** 10 units which is perpendicular to \(\begin{pmatrix} 3 \\ -4 \end{pmatrix}\) **b.** \(3\sqrt{2}\) units which is perpendicular to \(\begin{pmatrix} 1 \\ -1 \end{pmatrix}\) **c.** \(\sqrt{20}\) units which is perpendicular to \(\begin{pmatrix} -2 \\ -1 \end{pmatrix}\) In this problem, you are tasked with finding vectors with specified lengths that are perpendicular to given vectors. Perpendicular vectors, or orthogonal vectors, have a dot product of zero. The dot product of two vectors \(\begin{pmatrix} a \\ b \end{pmatrix}\) and \(\begin{pmatrix} c \\ d \end{pmatrix}\) is defined as: \[ a \cdot c + b \cdot d = 0 \] When asked to find a perpendicular vector of a certain length, you must determine a vector that holds this property and also has the specified magnitude (length).
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