Odpowiedź:
Dane:
v= 36 km/h = 36 *(1km/1h) = 36 * (1000m/3600s) = 36000/3600 m/s = 10 m/s
m = 40 kg
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Ek = ?
Ek = (mv²)/2 = (40kg*(10m/s)²)/2 = (40·100/2 (kg·m²/s²) = 4000/2 J = 2000 J = 2 kJ
odp. Ek = 2 kJ
zamiana km/h -> m/s v[km/h] :3,6 = v [m/s] np. 36km/h:3,6 = 10 m/s
zamiana m/s -> km/h v[m/s] ·3,6 = v [km/h] np. 10 m/s · 3,6 = 36 km/h
