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It's not my intention to refute physics because we KNOW that energy cannot be produced by setting (and leaving) a weight on the ground.
BUT...can someone please enlighten me.
Obviously, compressing (or stretching) a spring requires energy. (If I do this with my hands I would have to press together or stretch out the spring, applying force all the time. If I stop, the spring will snap back in it's initial form. Agree? --- SIMPLE EXAMPLE).
If I put the spring on the ground now I can put a large weight on it and the spring is getting compressed by the FORCE OF GRAVITY which is applied to the mass. CORRECT?
In the same way as I will always have to supply physical energy to compress the spring with my hands, the weight is compressing the spring.
WHY can this energy not be harvested?
The argument there is no energy cannot fly since energy must be constantly being supplied to compress the spring. (Obviously, gravity will "pull down" the weight and there is no reason it would stop doing this)
The energy can also not all-of-a-sudden be "zero" since then the spring would not be compressed?
Anyone enlighten me....
I don't think so, the moment the tire drops 2cm, the engine would have to push a little harder to get out of that hole.
Not if you're using it on a flat.
You might as well have rolled onto a single plate that dropped the entire distance before you rolled off the other end, breaking it into little pieces just obfuscates the problem.
You insult me because I say it will vary and you think this is common knowledge. In the next, you insult me because you think it should NOT vary.
I assume you drive an automatic? I don't. I can just downshift, but I digress.
So (1) I am not talking about using this on level ground and (2) the lip, I repeat, has been eliminated.
Now, Bedlam: you're still touting this 'use the downhill momemntum to push my car up the next hill' line.
Actually, that's a great example: it proves my point. If you had a setup like that, I could drive up the hill with just enough residual momentum to get me over the crest and on to the plate — which in your scenario is now a hydraulic lift powered by the weight of my car, and which harvests energy from my descent. With my engine switched off or idling, I actually save gasoline.
Thanks for providing such an conceptual proof that the idea is indeed sound. I guess it takes a scientist.
Unfortunately your scheme won't work in practice, because if you had a setup like that there would be a traffic jam at the top of the hill while cars queued to take their turn on the lift. Breaking the lift up into little pieces, as originally suggested, eliminates that problem.
reply to post by Bedlam
In the real world, we keep our drivetrains engaged when in motion for reasons of safety and convenience. We do not end up saving much petrol on downslopes, because we keep our throttles slightly open most of the time even when going downhill.
I am not talking about using it on a flat.
On this, see my conversation with Bedlam immediately above.
Your other objection is somewhat frivolous.