Motion in a Plane - Result Question 20
22. The resultant of $(\vec{A} \times 0)$ will be equal to [1992]
(a) zero
(b) $A$
(c) zero vector
(d) unit vector
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Answer:
Correct Answer: 22. (c)
Solution:
- (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.
