tolong jawab dgn cara penyelesaiannya nomer 18

Jawaban E.


Cttn :

massa = 50 N

Yang artinya :

m = W/g
m = 50/10
m = 5 Kg....... (1)



Maaf Jika ada salah...

DINAMIKA

w₁ = w₂ = 50 N → m₁ = m₂ = 10 kg
α = 45° → sin α = cos α = ½√2
μₖ = 0,2 = ⅙
a = ___?

tinjau sistem keseluruhan
ΣF = 0
w₁ₓ - fₖ₁ - fₖ₂ = (m₁ + m₂) a
w₁ sin α - μₖ w₁ cos α - μₖ w₂ = (m₁ + m₂) a
50 • ½√2 - ⅙ • 50 • ½√2 - ⅙ • 50 = (5 + 5) a
25√2 - 5√2 - 10 = 10 a
20√2 - 10 = 10 a
2√2 - 1 = a
2 • 1,4142 - 1 = a
2,8284 - 1 = a
a = 1,8284 m/s² ✔️

Besar percepatan sistem balok 1,83 m/s².