werson tan Messages 183 Reaction score 1 Thread starter Nov 23, 2015 #1 Homework Statement As in the photos Homework EquationsThe Attempt at a Solution my working is (6.43x10^-3)(310+10) + (11x10^-3)(155) / (6.43x10^-3 +11x10^-3 ) = 215.8 , but the ans is 112 , what's wrong with my working ? Attachments 3.png 69.9 KB · Views: 487
Homework Statement As in the photos Homework EquationsThe Attempt at a Solution my working is (6.43x10^-3)(310+10) + (11x10^-3)(155) / (6.43x10^-3 +11x10^-3 ) = 215.8 , but the ans is 112 , what's wrong with my working ?
.Scott Science Advisor Homework Helper Messages 4,066 Reaction score 2,120 Nov 23, 2015 #2 All of the Y-bars are measured from the top of the structure. So the position of the vertical I is 10.2+155
All of the Y-bars are measured from the top of the structure. So the position of the vertical I is 10.2+155
