Recent content by Ekka

Calculating forces ... vectors etc? Hi all, I need to figure this out but I also need answers. I'm a tree guy and our fields cross paths in many instances when coming to rigging forces. In this diagram I have substituted a leaning tree for a steel beam which has a swivel under it so it...

Ok, seems to work, thanks for the help, I'll pass on the intelligent comment of arildno. I can read the board without logging in. And Tide, point taken but not agreed, some need thicker skin.

I thought my question was quite clear. I also mentioned I wasn't sure where to post it so if it's in the wrong place, fine, get a moderator to move it. Funny, you can come along to our Tree forums, post a pic, get help no worries, last place you'd be sent is Google. Fat lot of good this...

Ok This is much better. I use metric scale. So at the end of 1 second we have traveled 4.9m and have a velocity of 9.8ms ... so what is the formula for this? D is distance in m. D=? Also,what's the answers for 2,3 and 4 seconds? Hallsofivy wrote this x(t)= (-a/2)t2 what does...

I'm a 43 year old arborist who works on trees, I have plenty of books on trees and diseases and can tell you how to look after them, climb them, prune them and remove them. We often are faced with knowing a few things in this realm. I do not have a physics book and since I left school...

Didn't know where to exactly post this but I'm wondering how you work out 2 things. No wind resistence etc to be considered please. I drop an object, it falls for 1 second, how far will it fall and what speed will it be doing? Same for 2 secs and 3 secs and so on? How do I work it out and...

Hi again ... to both of you I'm an Aussie, and this question is a long debate in our industry. Once the log is falling the rope does nothing, it's there to get it going. We fell trees with a directional scarf, when doing the back cut the rope is used to pull the tree over on the hinge...

Hey Rayjohn01 I don't know if you got to open the diagram but the angle of the rope going from the tree to the ground, where it's connected to a truck is 60 degrees (the pulling angle), we never try to pull at less than 45 degrees becase that means we are trying to get more downward force...

To Rayjohn01 I have noticed a difference, you seem to get more force and a better pull tied to the top but I can't prove it. Most people say the only difference is stretch in the rope as you need a lot more rope if you're going to tie off at the base. Some say that the force is equal, 30kn is...

Hmm, I am an aborist and run a tree business. I have taken on many "big" trees and am well experienced. I have never (touch wood) had anything go wrong and ended up with an insurance claim. But, the reason I'm seeking the answer in physics is because a debate has been going on for years...

Hi Lets say you have a 100' tree and you have the pull line going through a fork up the top. You have 2 options of where to tie it ... A/ Tie to the top fork (running bowline etc) B/ Tie off on trunk at base My question is, is it the same? Before you answer please consider that...