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V² = V₀² - 2gh
Persamaan 1 --> V₁² = V₀² - 2.g,h₁
V² = (√7)² - 2.10.h
V² = 7 - 20h
Persamaan 2 --> V₂² = V₀² - 2.g.h₂
(1/2 V)² = (√7)² - 2.(10)(2h)
1/4 V² = 7 - 40.h
V² = 28 - 160h
Pers 1 substitusi dengan Persamaan 2
7 - 20h = 28 - 160h
140h = 21
h = 3/20 m
h = 1/15 m
= 0,067 m