If dot product of two vectors which are not perpendicular to each other is zero, then either of the vectors is:
Correct answer: C. A null vector
- A. A unit vector
- B. Opposite to the other
- C. A null vector
- D. Position vector
Explanation
If the vectors are not perpendicular and still the product is zero, then this implies that either of the two vectors is a null vector. The product of any vector with a null vector is zero.
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About Vectors and Equilibrium
Vectors have magnitude and direction, unlike scalars, and are combined by head-to-tail or parallelogram methods. Work covers rectangular components, equilibrium when the resultant force is zero, the scalar product for work and projections, and the vector product for torque and cross-product direction using the right-hand rule.
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