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Verified answer
Diket :wo = 30rad/s
a = -1/4 rad/s^2 atau -0.25 rad/s^2
Jawab :
W = Wo+at
0 = 30+(-0,25)t
0,25t = 30
t = 120 detik
Teta = Wo.t+1/2at^2
Teta = 30.120 + 1/2(-0,25)(120)^2
Teta = 3600-1800
Teta = 1800 rad
Berhenti setelah 120 detik
Berhenti setelah menempuh 1800 radian