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GMBKelas X
18π rad putaran , Maka 18π / 2π = 9 putaran
n = 9 putaran
t = 20 s
R = 0,5 m
a.
f = n / t
f = 9 / 20
f = 0,45 Hz
b. T = 1 / f
T = 1 / 0,45
T ≈ 2,22 s
c. ω = 2πf
ω = 2π × 0,45
ω = 0,9π rad/s
d. v = ωR
v = 0,9π × 0,5
v = 0,45π m/s
maaf kalau salah