Odpowiedzi

2010-01-19T11:06:53+01:00
Zad.1
PRACA = ENERGIA
Ep= m*g*h
Ep = 5kg * 10m/s² * 3m = 150kgm²/s²
Ep = W = 150J

Zad.2
W = Ep = m * g * h
m = Ep : (g * h ) =20000J :(10 * 10 )=20000: 100=200 kg.
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