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Q - ciężar
dk - gęstość kulki
dw - gęstość wody
Fw - siła wypadkowa
F = V*dw*g
Q = m*g = V*dk*g
Fw = F-Q
Fw = F-Q
Fw = V*dw*g - V*dk*g
Fw = V*g * (dw-dk)
a = Fw/m
a = V*g * (dw-dk) / m
a = V*g * (dw-dk) / V*dk
a = g * (dw-dk) / dk
a = 10*(1000-800)/800
a = 2,5m/s²