Let us take i, j and k be three unit vectors such that:
Correct answer: A. i . j = 0
- A. i . j = 0
- B. i . j = 1
- C. i . j = k
- D. i . j = j
Explanation
The dot product of i and j is zero. This is because these unit vectors are perpendicular to each other in a Cartesian coordinate system.
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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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