Can you lift your weight using a pulley and rope, or would you just be lifting your body off the ground because the load is heavier than you, like a pull up.
2006-10-23 09:09:14 · 10 answers · asked by pulleyman123 2 in Science & Mathematics ➔ Physics
no... unless you have more than one pulley
2006-10-23 09:11:23 · answer #1 · answered by smjps2 1 · 0⤊ 0⤋
Easy. Attach the pulley to the weight to be lifted, one end of the rope to something above, and pull up. A force of 1/2 your body weight will lift a weight equal to your body weight. This is a VERY poorly worded question. A really strong person could lay the pulley and rope on top of a weight equal to his body weight and simply lift everything directly, therby satisfying your request as asked. Not to mention several other interpretations of the ?
2016-03-28 05:16:10 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Yes, the more pulleys you use the "lighter" whatever you are lifting feels. Pulleys change the direction and point of application of a pulling force and in various combinations to increase the applied force especially for lifting weights
2006-10-23 09:18:27 · answer #3 · answered by Kit 2 · 0⤊ 0⤋
yes, you can, if you can do a pull up, then your arms have the strength to lift your whole body! Obviously like the other answers, the more pulleys you have the less work is required and the more rope you will pull to lift your weight! good luck with your experiment!!!
2006-10-23 09:19:20 · answer #4 · answered by Anonymous · 0⤊ 0⤋
absolutely, people do this every day. You can go down to your local science museum and try out the pulley chairs yourself.
For larger loads, the old sailing ships had "block and tackle" that were multiple pulleys to further reduce the load to the person pulling the rope.
2006-10-23 09:13:29 · answer #5 · answered by arbiter007 6 · 0⤊ 0⤋
Of course you can, you can lift a car engine with a series of pulleys and ropes , that can weigh half a ton ...
2006-10-23 09:11:36 · answer #6 · answered by jjjjulieeeelovellyyy 2 · 0⤊ 0⤋
we did this at a science field trip for our kids . . and it took 2 pulleys to lift a person pulling them selves up . the single pully didn't work I'm a big woman but I was able to lift myself with 2 and easily with 3 pullys . . my son whos 8 was able to lift himself with 2 pullys
2006-10-23 09:14:11 · answer #7 · answered by Rainy 5 · 0⤊ 0⤋
One pulley with difficulty. Two pullies, very easy. It's all in the set-up.
2006-10-23 09:11:23 · answer #8 · answered by GRUMPY1LUVS2EAT 5 · 0⤊ 0⤋
my answer before was misleading. The actual advnatge you gain from a simple pully where you jsut have one pully is that your weight is halved. However, the way the pullys are set up affects the advantage. There is no general rule except more pullys = less force.
2006-10-23 09:43:59 · answer #9 · answered by abcdefghijk 4 · 0⤊ 0⤋
Yes.
2006-10-23 09:46:29 · answer #10 · answered by Anonymous · 0⤊ 0⤋