The scalar product of two parallel vectors is equal to:
Correct answer: C. Product of their magnitude
- A. Zero
- B. Square of the magnitude
- C. Product of their magnitude
- D. Sum of their magnitude
Explanation
The scalar product is AB cos theta, and for parallel vectors theta is 0 degrees and cos 0 is 1, so the product is simply the product of their magnitudes. It is zero only for perpendicular vectors.
This question appeared on the UHS MDCAT 2026 paper, which you can sit online with every answer explained.
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About Scalar Product
The scalar product of two vectors is A dot B equals AB cos theta, producing a scalar determined by their magnitudes and included angle. Applications include work done and projection of one vector on another, with perpendicular vectors giving zero and the scalar product distinguished from the vector product.
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