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α = 75⁰
x = 20 m
g = 10 m/s^2
Vo = ?
X = Vo^2 sin 2.75⁰ / g
20 = Vo^2. sin 150 / 10
Vo^2 = 20. 10 / sin 150⁰
Vo^2 = 200 / 0,5
Vo^2 = 400
Vo = √400
Vo = 20 m/s
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