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Question 5438
NEET Physics · Hard

Laws of Motion: Advanced Friction MCQ

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Advanced FrictionHardQuestion 5438

Question

The minimum force needed to move mass m on surface with μ, applied at optimal angle, is:
  1. A
    μmg
  2. B
    μmg/√(1+μ²)
    Correct
  3. C
    mg/√(1+μ²)
  4. D
    μmg√(1+μ²)

Correct answer

μmg/√(1+μ²)

Explanation

Minimum force at optimal angle θ = tan⁻¹(μ): F_min = μmg/√(1+μ²).

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