Consider the vector A = 2i + 5j. Vectors perpendicular to A include
A) 4i + 10j.
B) 5i + 2j.
C) 5i - 2j.
D) none of the above.

Name: Consider the vector A = 2i + 5j. Vectors perpendicular to A include A) 4i + 10j. B) 5i + 2j. C) 5i - 2j. D) none of the above.
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Question

Quizplus · Accepted Answer

Two vectors are perpendicular if their dot product is zero. The dot product of A = 2i + 5j and C = 5i - 2j is (2)(5) + (5)(-2) = 10 - 10 = 0, so they are perpendicular.

Consider the Vector a = 2i + 5j