A vector such as the velocity of a body undergoing uniform translational motion, which can be displaced parallel to itself and applied to any point known as:
Correct answer: B. Free vector
- A. Unit vector
- B. Free vector
- C. Null vector
- D. Position vector
- E. Resultant vector
Explanation
Option B is the correct answer because a free vector is one whose action is not confined or associated with a unique line in space. For a body in uniform translational motion, the velocity of any point in the body may be taken as a vector and this vector will equally well describe the velocity of all points in the body. Hence, the velocity of such a body may be represented by a free vector.
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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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