JEE Physics · Hard

Circular Motion: Circular Motion — Non-Uniform MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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Circular Motion — Non-UniformHardQuestion 30645

Question

A particle moves in a circle of radius 3 m. At a certain instant, v = 6 m/s and a_tangential = 4 m/s². The magnitude of total acceleration is:
  1. A
    12 m/s²
  2. B
    √(148) m/s²
  3. C
    √(160) m/s²
    Correct
  4. D
    16 m/s²

Correct answer

√(160) m/s²

Explanation

a_c = v²/r = 36/3 = 12 m/s². a_t = 4 m/s². a_total = √(12² + 4²) = √(144+16) = √160 ≈ 12.65 m/s².