Three forces in equilibrium: if two are equal and at 120°, third force is:

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Vector equilibrium: three equal forces at 120° form closed triangle. Third force equals magnitude of others, oriented 120° from each. Memory aid: 'Equilibrium: vector sum = 0; symmetric forces ⇒ symmetric angles'. Statics concept frequently tested in competitive exams.

Three forces in equilibrium: if two are equal and at 120°, third force is: MCQ with Answer and Explanation

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