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JEE Advanced Mathematics question

MathematicsVector AlgebraJEE Advanced

The vertices of a triangle are , and . The moment of a force of magnitude acting at along about is

Answer: (A)

Solution

, , so the force is

The moment about is , where $=Missing argument for \vec\vec A-Missing argument for \vec\vec C=-3Missing argument for \vec\vec i-3Missing argument for \vec\vec j-2Missing argument for \vec\vec

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Question ID VK-109721