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Verified answer
Gerak MelingkarKelas X
n = 10
t = 3 s
R = 20 cm = 0,2 m
a. f = _ ?
f = n/t
f = ¹⁰/₃ Hz
b. v = _?
v = ωR
v = 2πf R
v = 2π • ¹⁰/₃ • 0,2
v = ⁴/₃ π m/s
atau
v = ⁴/₃ • 3,14
v ≈4,1867 m/s