A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 3 years ago
find the centroid..drawing, one moment pls
anonymous
 3 years ago
find the centroid..drawing, one moment pls

This Question is Closed

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0dw:1342574765308:dw

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0y bar=(sum y local bar * area)/(sum area) so i thought it should be [(.5*1*5)+2(1*2*1)]/(1*5+2*1*2)... but solution says [(.5*1*5)+2(2*1*2)]/(1*5+2*1*2)

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0What's the horizontal dimension across the top?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0sorry, it's 5. so 3 on the smaller part

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0where they have "2", i have as 1 b/c...dw:1342637555114:dw

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Sorry for the wait, had to go do something + internet problems. for the two smaller portions it should be:\[2(1)2+2(1)2\]Which simplifies to\[2[2(1)2]\] You got the distance from the top to the center of the small triangle wrong, it should be 2 not 1. Note that they calculated the centroid from the top of the figure, not the bottom dw:1342639178273:dw

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0And when i say triangle... I mean rectangle, ha

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0that explains everything since it's a problem of using shear formula so i have to find Q too which i was about to ask next. it all makes sense now but why is the centroid calculated from the top? is that the only way?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0o, i believe you can. i was doing it wrong b/c when i got the y local bar for the top portion, i didn't use 2.5 if i were assuming the bottom to be centroid..klutz

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0As far as the centroid calculation itself, It doesn't matter whether you calculate it from the bottom or top. If you calculated from the bottom you would get a different numerical answer, but it would still point to the centroid. I can't explicitly remember, but there may have instances where it is advantageous to calculate from the bottom or top
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.