Jawabanmu

2014-02-13T20:17:45+07:00
Em1 = Em2
Ep1 + Ek1 = Ep2 + Ek2
mgh1 + 1/2mv1^2 = mgh2 + 1/2mv2^2 -> massa dapat dicoret karena semua unsur mengandung m
10.12 + 0 = 10.h2 + 1/2.144
120 = 10h2 + 72
120-72 = 10. h2
48 = 10. h2
h2 = 4,8 m
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