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V= 2000 km/s = 2000000 m/s = 2×10⁶ m/s
m= 1,6×10⁻²⁷ kg
Szukane:
Ek=?
Wzór:
Ek=½×mV²
Rozwiązanie:
Ek=½ × 1,6×10⁻²⁷kg × (2×10⁶ m/s)² = ½ × 1,6×10⁻²⁷kg × 4×10¹² m²/s² = ½ 6,4×10⁻¹⁵kg×m²/s² = 3,2 × 10⁻¹⁵ J