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  4. In the given diagram PQ=A, QR=B, and RS=C then PS equals,

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Q. In the given diagram $PQ=A,\, QR=B$, and $RS=C$ then $PS$ equals,Physics Question Image

KEAMKEAM 2016Motion in a Plane

Solution:

According to polygon law of vector addition
image
$ A+B =P R$
and $ P R+R S =P S $
$ \Rightarrow A+B+C =P S $