Motion in a Plane - Result Question 20

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22. The resultant of $(\vec{A} \times 0)$ will be equal to [1992]

======= ####22. The resultant of $(\vec{A} \times 0)$ will be equal to [1992]

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(b) $A$

(c) zero vector

(d) unit vector

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Answer:

Correct Answer: 22. (c)

Solution:

  1. (c) When a vector is multiplied with a scalar, the result is a vector.

The cross product of $\vec{A}$ and $\vec{B}$ is a vector with its direction perpendicular to both vector $\vec{A}$ and $\vec{B}$. Vector $\vec{A} \times 0$ is a zero vector because 0 is a scalar then also the product is zero but a (scalar $\times$ vector) is also vector.