Interesting that the conversation has gone from "the slope isn't sufficient to move the blocks" to "aren't we worried about it becoming a battering ram?"

The fact is, the answer is somewhere in the middle. I think the blocks would have moved with help from a worker or two behind it, helping it along. At no point could it have gotten up enough speed, because it would need to be traveling in a perfectly straight line to do so. It would twist slightly and become wedged on a regular basis, thus halting its downward rush.

However, the slope would allow for the bulk of the weight to be moved along by gravity, while the fine-tuning of a lever from the back side would have kept it moving in the right direction, in small increments.

One man, one 2-cubit long lever, and the natural forces of nature would have probably been completely sufficient to accomplish this entire task. I think the only lubricant necessary might have been water. Anybody who has climbed these surfaces knows just how slick they already are. Add water, and you've got the equivalent of ice.

Anthony

You can lead a horse to water but you can't make him think.