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Jawaban:
D. g dan mg
Penjelasan:
⭐Menentukan percepatan ke bawah silinder (a):
Semua benda yang jatuh di permukaan bumi, percepatannya akan selalu sama yaitu sebesar percepatan gravitasi (g = 10 m/s²). Sehingga percepatan silinder tersebut adalah sebesar g.
⭐ Menentukan tegangan tali (T) :
Silinder terlilit pada tali, sehingga pada saat jatuh silinder akan bergerak berputar (berotasi).
Percepatan sudut perputaran = Percepatan ke bawah / jari-jari
α = a/r
α = g/r
Percepatan sudut perputaran = Total Momen gaya / Inersia silinder
α = Στ / I
(g/r ) = (T.r) / m.r²
(g/r ) = T / m.r
T = (g/r) . m.r
T = mg
Sehingga tegangan talinya sebesar mg