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	[[Category:Primary]]		[[Category:Primary]]
			[[Category:Topics, Projects and Tasks]]
	[[Category:Ancient Egypt]]		[[Category:Ancient Egypt]]

DT Online at 18:52, 5 October 2016

2016-10-05T18:52:58Z

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			=====Testing=====
	[[File:PyramidSledRunners.png \|right\|300px\|]]		[[File:PyramidSledRunners.png \|right\|300px\|]]
	~~=====Testing=====~~

	* How much difference does the slope angle make to the force needed to pull the sled?		* How much difference does the slope angle make to the force needed to pull the sled?

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2016-10-05T18:51:43Z

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[[File:PyramidRamp.png|right|500px|]]
__TOC__

=====Description=====

It is generally agreed that the massive blocks of sandstone, limestone or granite ''(each weighing around 2½ tonnes)'' were dragged on '''Sleds''' to the building site where the Pyramids were being constructed.

Some theories suggest also that the stones were positioned on to the Pyramid by dragging the '''Sleds''' up ramps. There is debate about the types of ramp used and whether or not this formed only part of the lifting process but, in general, dragging loaded '''Sleds''' along tracks and up ramps, at least for part of the journey, was likely to have been undertaken. The '''Sleds''' would have been dragged over planks by teams of workers. Water (or milk) could have been poured under the '''Sled''' runners to reduce friction.

[[File:PyramidSledTest.png|right|300px|]]
=====Activity=====

* Build a model '''Sled''' from '''[[:Category:Stripwood Technology|Stripwood]]''' as shown. Load it with a 1kg mass then use a Newton meter to pull it up card slopes set at different angles ''(you may wish to glue lengths of stripwood under the card to stiffen it)''
* Glue stripwood across a reinforced card ramp set to your chosen angle, fill the gaps in between with soft sand then try again.

[[File:PyramidSledRunners.png |right|300px|]]
=====Testing=====

* How much difference does the slope angle make to the force needed to pull the sled?
* What do think would be the best angle for a ramp which pyramid builders could use and why?
* What difference does it make if you wet the sand or pour soapy water over the wood strips?
* Try shaping the front of the runners to an angle, or rounded - does this make any difference to the force needed to move the '''Sled'''?
* Glue 'Lolly Sticks' to the side of the runners to make them narrower - what difference does this make?

{{Stripwood Frames Buyers Guide}}

[[Category:Primary]]
[[Category:Ancient Egypt]]

Ancient Egyptian Stone Sled - Revision history

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