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Ek dititik p = 1/2 mv²
= 1/2 m.8²
= 32m
Em = Ep + Ek
= 32m
Em dititik R = EPr + Ekr
Epr = 1/2 ky²
= 1/2 mω²y²
= 1/2 m
= 1/2 m
= 1/2 m
=
Ekr = 1/2mv²
Em ditik R = Em dititik P
Em =
32m =
v² =
= 36,57
v = √36,57
≈ 6 m/s
4. Gunakan v = √2g (h₁-h₂)
= √2 .10 (6-1)
= √100 = 10 m/s