If we multiply vector by -1, then its direction changes by _.
Correct answer: D. 180°
- A. 90°
- B. 160°
- C. 270°
- D. 180°
Explanation
When a vector is multiplied by a scalar, the size of the vector is "scaled" up or down. Multiplying a vector by a positive scalar will only change its magnitude, not its direction. When a vector is multiplied by a negative scalar, the direction will be reversed which in this case refers to 180 degrees.
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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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