Odpowiedzi

2009-12-03T21:31:22+01:00
M = ?
Q = m*g
Fn = Q
S = 1m*1m = 1 m^2
g = 10 m/s^2

p = Fn/S, p = m*g/S => m = p*S / g
m = 120 * 1 / 10 = 12kg