Odpowiedzi

2010-03-21T15:57:37+01:00
V = 10 m/s
E = 100 J
m = ?
Ek = m*V^2/2
2Ek = m*V^2
m = 2Ek/V^2
m = 2 *100 J/(10 m/s)^2
m = 200 J/100 m^2/s^2
m = 2 kg
[J / m^2 /s^2] = [ kg *m^2/s^2 / m^2/s^2] = [kg]
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