Răspunsuri

2014-02-26T15:04:35+02:00
P = F/S = G/S = mg/S
F = G = m x g
S = 2 x 40 x 0,03 = 2,4
500 = mg/2,4 => mg = 1200 ( g = 10N/kg)
                             m = 120kg
                          
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