Odpowiedź:
V = 72 km/h = 20m/s
Ek = 1200J
m =?
Ek = (mV²)/2
2Ek =mV²
m = 2Ek/V² = 2400/400 = 6kg
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Odpowiedź:
V = 72 km/h = 20m/s
Ek = 1200J
m =?
Ek = (mV²)/2
2Ek =mV²
m = 2Ek/V² = 2400/400 = 6kg
Wyjaśnienie: