Question

Un sac de ciment are G1 = 200N. Din sac se scoate o cantitate de G2 = 60N. Cate kg de ciment s-au folosit?
g = 9,8  N/kg

Answer 1

200N-60N=140N
60:9,8N/Kg=6.122 kg

Answer 2

Datele problemei: $G_{1} =200N \\ G_{2}=60N \\ m_{3}=? \\ g= 9,8 \frac{N}{Kg}$

$G_{3} = G_{1}- G_{2} =140N$
$G_{3}= m_{3}*g$ => $m_{3}$=$\frac{ G_{3} }{g}$
$m_{3}$=$\frac{140 N}{ 9,8 \frac{N}{Kg} } =14,28 kg$