Given the vectors \( \vec{A} = 2\vec{i} - 3\vec{j} + k \) and \( \vec{B} = -\vec{i} + 2\vec{j} + 4k \). If \( \vec{A} \) and \( \vec{B} \) are orthogonal to each other, find the value of \( k \).
Step 4: Solving for \( k \), we get \( 4k = 8 \) and finally, \( k = 2 \).
Step 1 :Step 1: Since vectors \( \vec{A} \) and \( \vec{B} \) are orthogonal, their dot product will be equal to zero. That is, \( \vec{A}\cdot\vec{B} = 0 \).
Step 2 :Step 2: Calculating the dot product, we get \( \vec{A}\cdot\vec{B} = (2)(-1) + (-3)(2) + (1)(4k) \).
Step 3 :Step 3: Simplifying, we get \( -2 -6 + 4k = 0 \).
Step 4 :Step 4: Solving for \( k \), we get \( 4k = 8 \) and finally, \( k = 2 \).