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Verified answer
KESEIMBANGAN BENDA TEGAR (kategori 6)mk = 1 kg
R = 2 . 10 cm = 20 cm = 0,2 m
g = 10 m/s²
mb = 2 . 1 kg = 2 kg
k = 1/2 (konstanta inersia)
α?
penyelesaian:
Tinjau Gerak Rotasi
τ = I α
T R = k mk R² α
T = k mk R² α / R
T = k mk R α
Tinjau Hukum Newton II
ΣF = mb a
w - T = mb α R
mb g - k mk R α = mb α R
Masukan angka
2 . 10 - 1/2 . 1 . 0,2 . α = 2 . α . 0,2
20 - 0,1α = 0,4α
20 = 0,4α + 0,1α
20 = 0,5α
α = 20 / 0,5
α = 40 rad/s²