E = 5 kJ= 5000 J
Ek = 2 kJ= 2000 J
m = 10 kg
g = 9,81 m/s^2 \approx 10 m/s^2
V = ?
h = ?
Ek = \frac{m*V^2}{2}
2Ek = m*V^2
V^2 = \frac{2Ek}{m}
V = \sqrt{\frac{2Ek}{m}}
V = \sqrt{\frac{2*2000 J}{10 kg}}
V = 20 m/s
czy en. mechaniczna to potencjalna?
Ep = mgh
h = \frac{Ep}{m*g}
h = [J/kg*m/s^2]
h = [m]