Amir is playing with his older brother Ajith. They are playing on the swing in the figure below. Amir is at point $B$ which is $140 \mathrm{~cm}$ from the fulcrum $F$. Ajith is at point $A$ which is $100 \mathrm{~cm}$ from $F$. If Amir's weight is 200 N, how much force must Ajith exert to make Amir go up?
[280 N]
11
punti
Livello 0
$\frac{d_1}{d_2}=\frac{F_2}{F_1}$ in questo caso
$\frac{0.14m}{0.1m}=\frac{F_2}{200N}$
$200N\cdot\frac{0.14m}{0.1m}=F_2$
$F_2=280N$
6486
punti
Livello 6
@grevo 👌👍👍
Equilibrium of Momenta :
OB*Fpb = OA*Fa
Fa = OB*Fpb / OA = 140*200/100 = 140*2 = 280 N
97084
punti
Genius II
