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NEET Physics · Hard

Basic Mathematics & Vectors: Vector Algebra MCQ

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Vector AlgebraHardQuestion 5132

Question

The resultant of two forces P and Q is R. If Q is doubled, the new resultant is perpendicular to P. Then:
  1. A
    P = Q
  2. B
    P = R
  3. C
    Q = R
    Correct
  4. D
    P = 2Q

Correct answer

Q = R

Explanation

If new resultant (with 2Q) is perpendicular to P, using the triangle law and the condition of perpendicularity leads to Q = R.

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