Hola tengo un problema AYUDENMEES LA PREGUNTA 19?

Coordenadas : ↑y||•———→ x

Fórmulas :

m₁ = 3kg

y) T₁ - m₁•g = m₁•aT₁ = m₁•(a + g)

m₂ = 4kg

y) N - m₂•g = 0N = m₂•gx) T₃ - T₁ + | Fr | = m₂•a

m₃ = 10kg

y) T₃ - m₃•g = m₃•aT₃ = m₃•(a + g)

T₃ - T₁ + | Fr | = m₂•am₃•(a + g) - m₁•(a + g) + | Fr | = m₂•a(a + g)•(m₃ - m₁) + | Fr | = m₂•a| Fr | = m₂•a - (a + g)•(m₃ - m₁)

Fr = μ•NFr = μ•m₂•gFr = 0, 40•4kg•10m / s²Fr = 16N

16N = 4kg•a - (a + 10m / s²)•(10kg - 3kg)16N = 4kg•a - (a + 10m / s²)•7kg16N = 4kg•a - 7kg•a - 70N86N = (4kg - 7kg)•a86N = - 3kg•aa = - 28, 667m / s².