The horizontal force P = 85 N is applied to the upper block with the system initially stationary. The block masses are m= 19 kg and me = 9 kg. Determine the magnitudes of the frictions forces F₁ (between block A and the ground) and F2 (between blocks A and B) for the following conditions on the coefficients of static friction: (a) µ₁ = 0.37,₂ = 0.38 and (b) ₁ = 0.26, µ₂ = 0.48. Assume that the coefficients of kinetic friction are 74 percent of the static values. P B 20° A H₂ H₁

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The horizontal force P = 85 N is applied to the upper block with the system initially stationary. The block masses are mA = 19 kg and mg
= 9 kg. Determine the magnitudes of the frictions forces F₁ (between block A and the ground) and F₂ (between blocks A and B) for the
following conditions on the coefficients of static friction: (a) M₁ = 0.37,₂ = 0.38 and (b) ₁ = 0.26, 2=0.48. Assume that the
coefficients of kinetic friction are 74 percent of the static values.
P
Answers:
(a) F₁ =
(b) F₁ =
i
i
B
20⁰
0.37
0.26
A
2ܐ .
H1
N F₂=
N F₂ =
i
0.38
0.48
N
N
Transcribed Image Text:X Incorrect The horizontal force P = 85 N is applied to the upper block with the system initially stationary. The block masses are mA = 19 kg and mg = 9 kg. Determine the magnitudes of the frictions forces F₁ (between block A and the ground) and F₂ (between blocks A and B) for the following conditions on the coefficients of static friction: (a) M₁ = 0.37,₂ = 0.38 and (b) ₁ = 0.26, 2=0.48. Assume that the coefficients of kinetic friction are 74 percent of the static values. P Answers: (a) F₁ = (b) F₁ = i i B 20⁰ 0.37 0.26 A 2ܐ . H1 N F₂= N F₂ = i 0.38 0.48 N N
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