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Question

(d) From polygon law, three vectors having summation zero should form a closed polygon. (Triangle) since the two vectors are having same magnitude and

Vedclass · Accepted Answer

$90&deg;, 135&deg;, 135&deg;$

Vedclass · Answer

(d) From polygon law, three vectors having summation zero should form a closed polygon. (Triangle) since the two vectors are having same magnitude and the third vector is $\sqrt 2 $ times that of either of two having equal magnitude. i.e. the triangle should be right angled triangle

Angle between $A$ and $B$, $\alpha$ $= 90&deg;$

Angle between $B$ and $C$, $\beta$ $= 135&deg;$

Angle between $A$ and $C$, $\gamma$ $= 135&deg;$

Given that $\overrightarrow A + \overrightarrow B + \overrightarrow C= 0$ out of three vectors two are equal in magnitude and the magnitude of third vector is $\sqrt 2 $ times that of either of the two having equal magnitude. Then the angles between vectors are given by

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