Two blocks of masses 1 kg and 2 kg are in contact on a 60° rough incline. Their coefficients of friction with the plane are μ₁ = 0.5 and μ₂ = 0.4. Which statement is correct?

Question

G1 Physics · Accepted Answer

If each block moves independently, a = g(sin60°-μ cos60°). For μ₁=0.5, a₁ is smaller than a₂ for μ₂=0.4. The lower block therefore tends to move faster down the plane, so the blocks separate and the contact force becomes zero. Hence B.