Question

Hi, I desperately need help on all three of these questions. I have contributed a lot of answers to this section so would appreciate any help. No one in physics would answer.

question 1: http://img577.imageshack.us/img577/556/physicsquestion.png

question 2: http://img440.imageshack.us/img440/6100/physicsquestion2.png

question 3: http://img15.imageshack.us/img15/175/physicsquestion3.png

Answer 1

For Q1,
i get a force of 13.5 kN at 6m from point A
not 100% though

Answer 2

Thanks a lot dumbcow. How did you reach that answer? I understand it's to do with adding up all the moments but I don't know where to start.

Answer 3

Ohhh lol...you just find the area...so it's 27/2 kN yep

Answer 4

but how to find the centroid? hmm

Answer 5

How did you find the location? How did you get 6?

Answer 6

you think youve contributed alot of answers eh ....

Answer 7

hmmm, application is my weak point

Answer 8

never mind, i figured it out

13.5 * x = 3*4.5 + 7.5*9

so x = 6

Answer 9

cool :) im hoping to eventually be able to get as good at application as i am at actually numbering these things up

good job :)

Answer 10

i'm still hopelessly stuck for question 2 and 3 though :(

if i can do question 2a, then 2b is easy