It's "less THAN". How it grates my teeth whenever I read Americans writing "less then" and "more then"...Senax wrote:lift work done is less then the gravitational potential
Search found 61 matches
- Tue Oct 15, 2019 7:12 am
- Forum: General Discussion
- Topic: HIDDEN IN PLAIN SIGHT
- Replies: 31
- Views: 6723
Re: HIDDEN IN PLAIN SIGHT
- Tue Oct 01, 2019 8:48 am
- Forum: General Discussion
- Topic: Gravity Wheel
- Replies: 327
- Views: 67416
re: Gravity Wheel
Wubbly, thank you so much for creating that simulation, that must have taken a long time to do, very impressive. I looked at WM2D and it was way out of my price range - is there anything else that will run your simulation, that is (a lot) cheaper, or free? I would post up my Algodoo file of a wheel ...
- Sun Sep 29, 2019 3:33 pm
- Forum: General Discussion
- Topic: Gravity Wheel
- Replies: 327
- Views: 67416
re: Gravity Wheel
I've played with Algodoo for an hour or so, and come up with a wheel with eight pendulums on it - but I don't think Algodoo's simulation of pendulum movement is remotely realistic - they fly up far too high when I apply a light force to turn the wheel, and these are weights that are supposed to be 1...
- Fri Sep 27, 2019 9:16 am
- Forum: General Discussion
- Topic: Gravity Wheel
- Replies: 327
- Views: 67416
re: Gravity Wheel
WaltzCee: I don't know what force would cause the pendulums to pull in on the left and then fly out on the right. I think that's a misconception. Pendulums take time to swing from side to side. In this case, they would take so much time to swing from right to left, when moving from the 3 to 9 positi...
- Thu Sep 26, 2019 2:47 pm
- Forum: General Discussion
- Topic: Gravity Wheel
- Replies: 327
- Views: 67416
re: Gravity Wheel
You didn't answer my question though - what force is transmitted through the cord into the pivot, and thus into the wheel, when the pendulum hits the glove? The pendulum hits the glove at right angles to the cord. How can the cord transmit any reaction from this hit into the pivot? How can a cord cr...
- Thu Sep 26, 2019 11:19 am
- Forum: General Discussion
- Topic: Gravity Wheel
- Replies: 327
- Views: 67416
re: Gravity Wheel
The pendulum hanging from the central axle wouldn't have any power in it, they have to be suspended from the edge of a turning wheel. Can you draw a diagram showing what you mean?
- Thu Sep 26, 2019 9:28 am
- Forum: General Discussion
- Topic: Gravity Wheel
- Replies: 327
- Views: 67416
Re: re: Gravity Wheel
Where's Crazy Dave (the pendulum wiz) when you need him. He's got some nice vids of his experiments on YouTube. Can't remember where to find them now. His handle here is FunWithGravity2 Found one of them. MrJudgeFreed https://www.youtube.com/watch?v=Oy0gKtWc6Bc&t=38s That pendulum is too short ...
- Thu Sep 26, 2019 9:23 am
- Forum: General Discussion
- Topic: Gravity Wheel
- Replies: 327
- Views: 67416
The force transmitted through a rod that might hurt your hand is a vibration that is damped in a cord. The gravitational pull on a cord is the same as it would be on a rod. So the pivot would experience the same force in either case. Calloway's design rests on the pendulums lifting themselves (inwa...
- Wed Sep 25, 2019 8:28 am
- Forum: General Discussion
- Topic: Gravity Wheel
- Replies: 327
- Views: 67416
re: Gravity Wheel
Here is a free pendulum simulator that may be useful - unfortunately it doesn't measure forces at the pivot, which is what I'm looking for. http://phet.colorado.edu/sims/pendulum-lab/pendulum-lab_en.html I haven't had any spare time (I have a full time job, like a lot of members here no doubt) to pl...
- Tue Sep 24, 2019 1:59 pm
- Forum: General Discussion
- Topic: Gravity Wheel
- Replies: 327
- Views: 67416
re: Gravity Wheel
Without even doing any experiments, I'm sure that most of us know the experience of hitting something hard with a solid rod, such as a mattock, when trying to break up hard earth or rocks, and knowing that the impact force is, to some extent, transmitted up the handle and into your hand, so that you...
- Tue Sep 24, 2019 11:09 am
- Forum: General Discussion
- Topic: Gravity Wheel
- Replies: 327
- Views: 67416
re: Gravity Wheel
Can a cord attached to a pendulum exert a force perpendicular to its (vertical) length when the pendulum experiences a horizontal (or even diagonal) force? I don't think it can. See my attachment for a diagram. I think the whole of Calloway's design rests on this fact. Actually, having thought about...
- Mon Sep 23, 2019 7:37 am
- Forum: General Discussion
- Topic: Gravity Wheel
- Replies: 327
- Views: 67416
re: Gravity Wheel
Two quotes from John Collin's book 'Perpetual Motion' convince me that Calloway's design will work: from memory (as I haven't got the book with me at the moment), on page 110, somebody says that when they pushed the wheel gently, as soon as they let go it immediately stopped, but when they gave it a...
- Fri Sep 20, 2019 2:20 pm
- Forum: General Discussion
- Topic: Gravity Wheel
- Replies: 327
- Views: 67416
Re: re: Gravity Wheel
Hi Calloway, can you explain to me how the 9 o'clock weight can move the 3 o'clock weight when they are attached by a wire? (I presume you mean a flexible wire and not a rod). I don't understand how this is possible. With regards to having too many rods - could you not have two pairs of weights on ...
- Fri Sep 20, 2019 12:46 pm
- Forum: General Discussion
- Topic: Gravity Wheel
- Replies: 327
- Views: 67416
re: Gravity Wheel
Silent, an excellent post (your list of descriptions of Bessler's Wheel from witnesses), I was going to do exactly the same thing last night, but didn't have enough time. I am reading through John Collins' book 'Perpetual Motion' again, this time comparing everything I read, to Calloway's design, to...
- Fri Sep 20, 2019 7:22 am
- Forum: General Discussion
- Topic: Gravity Wheel
- Replies: 327
- Views: 67416
re: Gravity Wheel
Fletch, of course it isn't an inertial wheel and wouldn't work if laid flat. It all depends on gravity. The pendulums are the key, as I explained above, the forces on a pendulum are not transmitted through the string that is holding it in the same way as if the string and the pendulum were a rigid r...