Along the three mutually perpendicular axes x, y and z, the unit vectors are denoted by:
Correct answer: A. Option A: i, j, k
- A. Option A: i, j, k
- B. Option B: -i, -j, k
- C. Option C: x, y, z
- D. Option D: None of these
Explanation
The correct answer is Option A: i, j, k. In mathematics and physics, the unit vectors along the x, y, and z axes are commonly denoted by i, j, and k respectively. These unit vectors have a magnitude of 1 and point in the positive direction of their respective axes.
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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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