tolong kerjakan no 7 dengan caranya

ROTASI

ma = 2 kg
mb = 4 kg
mk = 4 kg, silinder pejal

percepatan
a = (mb - ma) g / (ma + mb + ½ mk)
a = (4-2) • 10 / (4+2+2)
a = 2,5/s²

Ta = ma (g + a)
Ta = 2 (10 + 2,5)
Ta = 25

Tb = mb (g - a)
Yb = 4 (10 - 2,5)
Tb = 30 N