- #1
musicgold
- 304
- 19
Hi,
I would like to get some help from you physics experts to solve this problem I am facing in my backyard.
Here is the swing I have created using a hanging chair tied to a 23 feet high branch with a 1/4" aircraft cable made of steel strands.
Problem:
When the chair is empty it stays in one position, but when someone sits in the chair (without swinging it in any direction) the swing starts spinning slowly anticlockwise (from the person's point of view as they are looking at the ground). It keeps spinning in the same direction for a long time and never comes to a halt. I want to be able to enjoy the chair without the spinning.
Solution attempts:
1. First I thought it was due to the slightly tilted horizontal wooden bar of the chair. As you can see I have added a counterweight on the right to it make the bar parallel to the ground. But the spinning continued.
2. Another reason could be the way the strands of the cable are twisted. I am not sure how to figure that out.
Then I observed a construction crane and the load tied to the line doesn't seem to spin. How do they achieve that?
http://imageshack.com/a/img540/9001/bqI2SE.jpg
I would like to get some help from you physics experts to solve this problem I am facing in my backyard.
Here is the swing I have created using a hanging chair tied to a 23 feet high branch with a 1/4" aircraft cable made of steel strands.
Problem:
When the chair is empty it stays in one position, but when someone sits in the chair (without swinging it in any direction) the swing starts spinning slowly anticlockwise (from the person's point of view as they are looking at the ground). It keeps spinning in the same direction for a long time and never comes to a halt. I want to be able to enjoy the chair without the spinning.
Solution attempts:
1. First I thought it was due to the slightly tilted horizontal wooden bar of the chair. As you can see I have added a counterweight on the right to it make the bar parallel to the ground. But the spinning continued.
2. Another reason could be the way the strands of the cable are twisted. I am not sure how to figure that out.
Then I observed a construction crane and the load tied to the line doesn't seem to spin. How do they achieve that?
http://imageshack.com/a/img540/9001/bqI2SE.jpg
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