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posisi 2 benda di tanah
Ep1 + Ek 1 = Ep2 + Ek2
mgh + 1/2mv² = 0 + 1/2mv₂² (semua ruas dibagi m)
10.0,8 + 1/2.4² = 1/2v₂²
8 + 8 = 1/2v₂²
16 = 1/2v₂²
32 = v₂²
v₂ =√32 m/s
Keadaan 2 : Benda jatuh di tanah dengan v=√32 sampai berhenti v2 = 0
v₂² = v₁²+2as
0 = 32+2.10.s
20s = 32
s = 32/20 = 1,6 m