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Question 5151
NEET Physics · Medium

Basic Mathematics & Vectors: Mixed Vectors & Calculus MCQ

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Mixed Vectors & CalculusMediumQuestion 5151

Question

Two forces of equal magnitude F make an angle of 120° with each other. The magnitude of their resultant is:
  1. A
    F
    Correct
  2. B
    2F
  3. C
    F√3
  4. D
    F/√2

Correct answer

F

Explanation

R = √(F²+F²+2F²cos120°) = √(2F²−F²) = F.

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