Let $\mathbf { v } = 7 \mathbf { j }$

question 48

Multiple Choice

Let $\mathbf { v } = 7 \mathbf { j }$ and let $\mathbf { u }$ be a vector with length 5 that starts at the origin and rotates in the $x y$ - plane. Find the maximum value of the length of the vector $| \mathbf { u } \times \mathbf { v } |$ .

• A) \(| \mathbf { u } \times \mathbf { v } | = 5\)
• B) \(| \mathbf { u } \times \mathbf { v } | = 7\)
• C) \(| \mathbf { u } \times \mathbf { v } | = 35\)
• D) \(| \mathbf { u } \times \mathbf { v } | = 157\)
• E) \(| \mathbf { u } \times \mathbf { v } | = 1\)

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