Bonjour,
E = 1/2 × m × v^2
0.5 = 1/2 × 0.0002(kg)×v^2(m/s)
0.5 = 0.0001 ×v^2
V^2 = 0.5/0.0001
V^2 = 5000
V = racine de 5000
V ~71m/s
71 × 3.6 ~255 km/h
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Bonjour,
E = 1/2 × m × v^2
0.5 = 1/2 × 0.0002(kg)×v^2(m/s)
0.5 = 0.0001 ×v^2
V^2 = 0.5/0.0001
V^2 = 5000
V = racine de 5000
V ~71m/s
71 × 3.6 ~255 km/h