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

Let → C = → a + → B - Physics

MCQ

Let $\vec{C} = \vec{A} + \vec{B}$

Options

• $\left| \vec{C} \right|$ is always greater than $\left| \vec{A} \right|$

• It is possible to have $\left| \vec{C} \right|$  < $\left| \vec{A} \right|$ and $\left| \vec{C} \right|$ < $\left| \vec{B} \right|$

• C is always equal to A + B

• C is never equal to A + B.

Solution

It is possible to have $\left| \vec{C} \right|$  < $\left| \vec{A} \right|$ and $\left| \vec{C} \right|$ < $\left| \vec{B} \right|$

Statements (a), (c) and (d) are incorrect.
Given: $\vec{C} = \vec{A} + \vec{B}$

Here, the magnitude of the resultant vector may or may not be equal to or less than the magnitudes of $\vec{A}$ and $\vec{B}$ or the sum of the magnitudes of both the vectors if the two vectors are in opposite directions.

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
MCQ | Q 2 | Page 28
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