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diketahui:
h = 3 meter
h1 = 1 meter
g = 10 m/s²
ditanya:
v?
jawab:
v = √2 . g . Δh
v = √2 . g . (h - h1)
v = √2 . 10 . (3 - 1)
v = √2 . 10 . 2
v = √40
v = √4 . 10
v = 2√10 m/s
jadi kecepatan batu tersebut adalah 2√10 m/s