Department of Pre-University Education, KarnatakaPUC Karnataka Science Class 11

# Let → a = 5 → I − 4 → J and → B = − 7 ⋅ 5 → I + 6 → J .Do We Have → B = K → a ? Can We Say → B → a = K ? - Physics

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Answer in Brief

Let $\vec{A} = 5 \vec{i} - 4 \vec{j} \text { and } \vec{B} = - 7 \cdot 5 \vec{i} + 6 \vec{j}$. Do we have $\vec{B} = k \vec{A}$ ? Can we say $\frac{\vec{B}}{\vec{A}}$ = k ?

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#### Solution

If $\vec{A} = 5 \vec{i} - 4 \vec{j}\text { and } \vec{B} = - 7 \cdot 5 \vec{i} + 6 \vec{j}$,then we have $\vec{B} = k \vec{A}$ by putting the value of scalar k as $- 1 . 5$ .

However, we cannot say that $\frac{\vec{B}}{\vec{A}}$ = k, because a vector cannot be divided by other vectors, as vector division is not possible.

Concept: What is Physics?
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#### APPEARS IN

HC Verma Class 11, Class 12 Concepts of Physics Vol. 1
Chapter 2 Physics and Mathematics
Short Answers | Q 14 | Page 28
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