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Verified answer
★ Hukum Hooke ★Kata kunci : Periode pegas
T = 2π √m/k
= 2π √0,9 kg /4
= 2π √9/4*10
= 2π(3/2) *√1/10
= 3π * √1/10
= 3√10 π / 10 ← jawaban