Recent content by Adam Hanns F A Cong

Thank you.😊 I learned pulley system two years ago at junior high,but I am not good analyse it. All in all, thanks for your help!😸

You mean like it? Forgive my ignorance,please. I may not know term mechanical advantage. Do you mean the next fig.2? I learnd that it comes from the level principle,and the level seems that it comes from the moment force or (angular) momentum,but I don't know how to find the momentum or radius...

The elastic force of the board,N=G_1+G_2=1000N. The kinetic friction f=μN=200N. The tension T=f=200N.