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Em = Ek + Ep
Ek di titik B = 100 J
Ep di titik B = m.g.h = 2,5.10.6 = 150 J
Em = 100 + 150 = 250 J
(Em di semua titik sama)
Di titik C(saat menyentuh tanah)
Berarti tidak mempunyai ketinggian atau Em = Ek
Ek = 250 J
Mohon maaf apabila ada kesalahan