> Author: cladking ()
> Date: March 26, 2020 07:57PM
> Again "lifting" is increasing the potential energy
> of an object by increasing its altitude. The means
> of lifting is irrelevant to this definition.
> Sliding a stone upward on a ramp IS "lifting".
> "irrelevant to what definition" ? What definition
> are you referring to?
If you define "lifting" as increasing potential energy then the means of lifting is irrelevant.
> Increasing it's altitude is
> only useful, if you permit Gravity to take effect.
Gravity always has an effect which is why you can define "lifting" as I do. There is always an exact correlation between weight times altitude and the increase in potential energy.
> Using 1 stone to lift another similar stone, is
> useless as a method of building.
And again. If they were quarrying stone on top of the Giza Plateau EXACTLY AS WE KNOW THEY DID it is possible, albeit unlikely, that they used the quarried stone as the ballast that drove the funiculars. They could have run the stones down the cliff face or causeway to power the equipment that lifted the stones for the pyramid. The main reason this is unlikely is that the net power delivered would be small so the quarry would have to be huge. Net power is low because of the relatively short drop from the position in the quarry to the river and the many inefficiencies of powering the devices to do this work. Also the other sites are less suitable to use this means and there is reason to believe the same means were used for every pyramid and from the top to the bottom of each pyramid. If the answer were they used stone as ballast we'd still not know how the other great pyramids were built.
> Yes, a ramp (Incline Plain) is lifting. Though it
> requires less energy than a dead lift.
It requires more. Much much more. Indeed, using primitive technology, materials and knowledge ity might require as much as about 50 times more work, energy, and power to lift. It merely requires a lower force to move the stone.
> difference is, a man may not, be unable to perform
> the dead lift, where as, with the Incline Plain,
> he can accomplish the task.
Mechanical advantage has its place but it always necessarily increases the total work because it is necessarily less efficient.
> NO ramp, No can do.
> With ramp, Can do...
This could be an example of the place for MA. But dragging stones up ramps is not evidenced and it is not the only way they could lift stones.