Block A and B shown in the figure are connected with a bar of negligible weight. A and B each has mass 170 kg, the coefficient of friction between A and the plane is 0.2 and that between B and the plane is 0.4 (g=10 ms−2)What is the total force of friction between the blocks and the plane?[Hint: tan−1(815)=28∘,cos28∘=0.883,sin28∘=0.469]

Block A and B shown in the figure are connected with a bar of negligib

1.	Block A and B shown in the figure are connected with a bar of negligible weight. A and B each has mass 170 kg, the coefficient of friction between A and the plane is 0.2 and that between B and the plane is 0.4 (g=10 ms−2)What is the total force of friction between the blocks and the plane?[Hint: tan−1(815)=28∘,cos28∘=0.883,sin28∘=0.469]
Answer» Block $A$ and $B$ shown in the figure are connected with a bar of negligible weight. $A$ and $B$ each has mass $170 kg$ , the coefficient of friction between $A$ and the plane is $0.2$ and that between $B$ and the plane is $0.4$ ( $g = 10 {ms}^{- 2}$ ) What is the total force of friction between the blocks and the plane? [Hint: ${tan}^{- 1} (\frac{8}{15}) = 28^{\circ}, cos 28^{\circ} = 0.883, sin 28^{\circ} = 0.469$ ]

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