On Jun 22, 10:24*am, W1TEF wrote:
On Tue, 22 Jun 2010 09:28:10 -0400, I am Tosk





wrote:
In article ,
says...

On Tue, 22 Jun 2010 08:00:09 -0500, Richard Casady
wrote:

On Tue, 22 Jun 2010 06:24:55 -0400, W1TEF
wrote:

Mechanical advantage would be a good way. *If you used two four rove
blocks in series - that works out to something like 35 lbs (I think)..
You could hang the blocks off the boom - should be solid enough for 35
lbs.

Wrong. While using a block and tackle will divide the weight among
several bits of line, the total will remain the same and that is what
the boom feels. The entire weight.

Show me where I'm wrong.

Is he saying that by using the tackle the weight on the boom will be
decreased? Who said that, Tom?

No - he misunderstood the nature of the answer. *Yes, the weight is
still 350 pounds. What you are effectively doing is reducing the
amount of energy required to move the 350 pounds by the use of
mechanical advantage. *It seems like you are only lifting 35 pounds.- Hide quoted text -

- Show quoted text -

But then again, it feels like you're lifting only 35 lb.at last 120
feet.

(I think)