Question

Physics,

https://www.dropbox.com/s/rgnjn3g22zxt2vq/Screenshot%202015-11-14%2017.36.24.png?dl=0

Answer 1

This isn't too bad lol.

Answer 2

Mass 15 is hanging from cord C right?

Answer 3

so if you draw a force diagram for mass 15kg, you get

Answer 4

you can calculate force of gravity to get F=mg=15*9.8=I dunno

Answer 5

Tell me what that answers while I explain the rest

Answer 6

Basically Force of gravity=Tension in cord C

Answer 7

So now you have half the problem done and you only need to find Tension in cord B and Cord A

Answer 8

but how do you do that!??!

Answer 9

Tension in cord C= Tension in cord By+Tension in cord Ay

Answer 10

Notice how I used y

Answer 11

y means upward component.

Answer 12

if you draw a force diagram at the Knot K you get:

Answer 13

but you only want the vertical components, so the force diagram then looks like