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ABC is a tria...

Question

$A B C$ is a triangle and $P$ is any point on $- - \to B C$ . If $- - \to P Q$ is the resultant of the vectors $- - \to A P, - - \to P B$ and $- - \to P C$ then $A C Q B$ is :

A

rectangle

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B

square

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C

rhombus

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D

parallelogram

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Solution

The correct option is D parallelogram
As, we have
$- - \to P Q = - - \to A P + - - \to P B + - - \to P C$
$- - \to P Q - - - \to P B = - - \to A P + - - \to P C$
$- - \to P Q - - - \to P B = - - - \to P A + - - \to P C$
$- - \to B Q = - - \to A C \dots (i)$
Similarly,
$- - \to P Q - - - \to P C = - - \to A P + - - \to P B$
$- - \to C Q = - - \to A B \dots (i i)$
So, $A C Q B$ is parallelogram

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Stress-Strain Graph

Standard XII Physics

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