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Ek = 1/2 . 2 . 30^2
Ek = 900 J
m = 2 kg
v = 30 m/s
g = 10 m/s²
dit :
Ek
jawab :
Ek = 1/2. m²
Ek = 1/2. 2. 30²
Ek = 900 Joule