If displacement of a body is d = 3i, its only significance is:
Correct answer: D. The displacement of 3 units along x-axis
- A. The displacement of 3 units is not along any axis
- B. The displacement of 3 units along z-axis
- C. The displacement of 3 units along y-axis
- D. The displacement of 3 units along x-axis
Explanation
D is the correct answer. The notation d=3i signifies a displacement of 3 units along the positive x-axis.
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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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