PhysicsScalars and vectorsJAMB
Two forces, each of 7 N, act at a point with an angle of 120° between them. Find the magnitude of their resultant.
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Answer: B. 7 N
R² = 49 + 49 + 2 × 49 × cos 120° = 98 − 49 = 49, so R = 7 N.
An AdmitMe practice question, written for the JAMB syllabus. Not an official past question.