Springs and Losing Energy
4 posts • Page 1 of 1
Springs and Losing Energy
I'm new to Algodoo.
I'm trying to demo a horizontal mass spring system for SHM, but no matter what I do, the system continues to lose energy. [Edit 2: Solved this too. It was air resistance. Toggled that off, and I'm good now. Thanks, I think
]
Here's the design.
1. Infinite vertical plane and horizontal plane
2. Box dropped onto the horizontal plane
3. Spring connecting box to vertical plane.
I've set spring damping to 0 and friction to 0 for the box and the horizontal plane. I've also set restitution to 1 for the box and the horizontal plane.
But, when I graph KE of the box, the graph over time shows a loss of energy. What do I need to change?
Also, can I graph the sum of the spring potential energy plus the KE of the box on a graph? If so, how? [Edit: Nevermind, figured out how to group the items. Still don't understand why I'm losing energy. Air resistance?]
Thanks.
I'm trying to demo a horizontal mass spring system for SHM, but no matter what I do, the system continues to lose energy. [Edit 2: Solved this too. It was air resistance. Toggled that off, and I'm good now. Thanks, I think
![Embarrassed :oops:](./images/smilies/icon_redface.gif)
Here's the design.
1. Infinite vertical plane and horizontal plane
2. Box dropped onto the horizontal plane
3. Spring connecting box to vertical plane.
I've set spring damping to 0 and friction to 0 for the box and the horizontal plane. I've also set restitution to 1 for the box and the horizontal plane.
But, when I graph KE of the box, the graph over time shows a loss of energy. What do I need to change?
Also, can I graph the sum of the spring potential energy plus the KE of the box on a graph? If so, how? [Edit: Nevermind, figured out how to group the items. Still don't understand why I'm losing energy. Air resistance?]
Thanks.
- mrchinphysics
- Posts: 1
- Joined: Sat Mar 28, 2015 4:38 pm
Re: Springs and Losing Energy
I am facing the same problem with bouncing bodies.
Simple bodies bouncing in a square room don't loose energy but when adding bearings or hinges we see a loss of energy.
There is no air resistance, all materials are set to friction = 0 and restitution = 1
Is this due to limitations of calculation accuracy?
Simple bodies bouncing in a square room don't loose energy but when adding bearings or hinges we see a loss of energy.
There is no air resistance, all materials are set to friction = 0 and restitution = 1
Is this due to limitations of calculation accuracy?
- groenkees
- Posts: 1
- Joined: Wed Jan 30, 2019 8:17 pm
Re: Springs and Losing Energy
It has mostly to do with the fact that hinges don't "fixate" an object, instead acting like an elastic pivot, and that elasticity is not 100% energy conserving.
- FRA32
- Posts: 229
- Joined: Wed Dec 03, 2014 9:51 pm
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