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m = 2 kg
R = ½ m
f = 180 rpm = 3 Hz
T = __
Anggap beban diputar melingkar pada bidang horizontal
Gaya tegangan tali sama dengan gaya sentrpetal
T = F
T = m w² R
T = m (2π f)² R
T = 4π² m f² R
T = 4π² • 2 • 3² • ½
T = 36π² N ← jwb