If the magnitude of a physical quantity is zero,can it be a vector? Give a suitable example.
(A) Yes,a physical quantity can be a vector even if its magnitude is zero. Such a vector is called a null vector or zero vector.
For example,if a ball is thrown vertically upwards and returns to the thrower's hand,the displacement of the ball is zero. Since displacement is a vector quantity,this zero displacement is represented as a null vector.
For example,if a ball is thrown vertically upwards and returns to the thrower's hand,the displacement of the ball is zero. Since displacement is a vector quantity,this zero displacement is represented as a null vector.
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Similar Questions
For the components of a vector $\vec{A} = (3 \hat{i} + 4 \hat{j} - 5 \hat{k})$,match the following columns.
Column $I$ Column $II$ $(A)$ Component along $x$-axis $(p)$ $5 \text{ unit}$ $(B)$ Component along vector $(2 \hat{i} + \hat{j} + 2 \hat{k})$ $(q)$ $4 \text{ unit}$ $(C)$ Component along $(6 \hat{i} + 8 \hat{j} - 10 \hat{k})$ $(r)$ $0$ $(D)$ Component along $(-3 \hat{i} - 4 \hat{j} + 5 \hat{k})$ $(s)$ None
| Column $I$ | Column $II$ |
|---|---|
| $(A)$ Component along $x$-axis | $(p)$ $5 \text{ unit}$ |
| $(B)$ Component along vector $(2 \hat{i} + \hat{j} + 2 \hat{k})$ | $(q)$ $4 \text{ unit}$ |
| $(C)$ Component along $(6 \hat{i} + 8 \hat{j} - 10 \hat{k})$ | $(r)$ $0$ |
| $(D)$ Component along $(-3 \hat{i} - 4 \hat{j} + 5 \hat{k})$ | $(s)$ None |
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View SolutionWhich of the following quantity/quantities are dependent on the choice of orientation of the co-ordinate axes?
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