Answer to Question #229395 in Physics for Hamza

Question #229395

If vectors 2i+4j-7k and 2i+6j+qk are perpendiculars then value of q is?

Expert's answer

If vectors are perpendicular, their scalar producti is equal to zero. Thus, obtain the following equation:

"2\\cdot 2 + 4\\cdot 6 -7\\cdot q = 0\\\\\nq = \\dfrac{28}{7} = 4"

Answer. 4.

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