2006-07-20 20:50:42 · 7 answers · asked by Spike 1 in Sports ➔ Outdoor Recreation ➔ Other - Outdoor Recreation
I dunno Spike. But go here to Howstuffworks...it explains everything about everything
- http://science.howstuffworks.com/pulley.htm
2006-07-20 21:10:45 · answer #1 · answered by zoomjet 7 · 0⤊ 0⤋
pulley and weight system should protect your cable from breaking because the weights should maintain a constant tension in the line. As the tree swings back and forth, the weights should rise and fall while the tension in the cord remains almost steady. Obviously, if the rising weights reach the pulley the cord will pull taut and break, so you must leave enough hanging slack.
2006-07-21 03:55:55 · answer #2 · answered by flymetothemoon279 5 · 0⤊ 0⤋
By providing a mechanical advantage for the person pulling on the rope.
The more pulleys used increases the length of rope or chain used but significantly reduces the effort required.
2006-07-21 03:59:11 · answer #3 · answered by Rob K 6 · 0⤊ 0⤋
With pulleys, easy 2 pts!
2006-07-21 03:53:29 · answer #4 · answered by Anonymous · 0⤊ 0⤋
With pulleys, the effort needed to move something reduces. This is due to 'mechanical advantage'
2006-07-21 03:59:47 · answer #5 · answered by welsh_darkhorse 3 · 0⤊ 0⤋
...well you thread this bit through this hole, then you take it and twist it 360`, force it through the other end, pull it tight..... very tight mind you........then what have you got? apart from a very big KNOT.........
2006-07-21 03:52:19 · answer #6 · answered by paul_9_25 3 · 0⤊ 0⤋
they go up and down.. thats all there is 2 it
2006-07-21 03:53:01 · answer #7 · answered by katie 1 · 0⤊ 0⤋