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Gerak MelingkarKelas X
21.]
R₁ = a
R₂ = 3a
Seporos , ω₁ = ω₂
Didapat
v₁ : v₂ = R₁ : R₂
v₁ : v₂ = a : 3a
v₁ : v₂ = 1 : 3 [B]
22.]
d = 24 cm
R = 12 cm
θ = 300°
s = _ ?
Ubah ke radian
θ = 300° x π/180°
θ = 5π/3 rad
s = θ R
s = (5π/3) • 12
s = 20π cm
atau
s = 20 • 3,14
s = 62,8 cm [C]