Let be vectors such that u + v + w =0 . If | u |=3,| v |=4 ext and | w |=5, then u v + v…
Physics · JEE Advanced · NTA Exams — Kinematics
Let 
be vectors such that \(\vec{u}+\vec{v}+\vec{w}=0 .\)If \(|\vec{u}|=3,|\vec{v}|=4 \ ext { and }|\vec{w}|=5,\) then \(\vec{u} \cdot \vec{v}+\vec{v} \cdot \vec{w}+\vec{w} \cdot \vec{u}\) is
be vectors such that \(\vec{u}+\vec{v}+\vec{w}=0 .\)If \(|\vec{u}|=3,|\vec{v}|=4 \ ext { and }|\vec{w}|=5,\) then \(\vec{u} \cdot \vec{v}+\vec{v} \cdot \vec{w}+\vec{w} \cdot \vec{u}\) is- 47
- –25
- 0
- 25
Answer
(B) –25
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