Question

Value of θ is increased gradually from θ = 0. At = tan^–1 (1/2)  both the blocks just start slipping. Than value of μ₂ is: (g = 10 m/s²)

(A) 0.5 (B) 0.4 (C) 0.6 (D) 0.3

Answer 1

Correct option (C) 0.6

Explanation:

At limiting case

(10 + 20) g sin θ = [(10) (0.3) + 20 μ₂] g cos θ

⇒ μ₂ = 0.6