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Ancient Egyptian Stone Sled

From DT Online

PyramidRamp.png


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.


PyramidSledTest.png
Activity
  • Build a model Sled from 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.


Testing
PyramidSledRunners.png
  • 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?


DT Online Buyers' Guide

Safety Point! Take great care with hot glue guns and all hot-melt glues. The melted glue can stick to the skin and cause severe burns.


Stanley Junior Hacksaw 0 15 218 Draper 14145 55 mm Clamp-On Hobby Bench Vice 5 x Richard Burbidge Decorative Wood Stripwood - Pine - 900 x 8 x 8mm Balsa Wood - Giant Pack House of Card & Paper A4 220 gsm Card - Assorted Bright (Pack of 100 Sheets) 100 sheets coloured card mix A4 300gsm thick card Am-Tech A3 Cutting Mat Chartwell A3 Orange Student Graph Pad 50 Sheets (1, 5 & 10mm Grid Paper) J13B 4 PVA Glue Washable Adhesive School Home Crafts Non Toxic Wood Paper Fabric Art Bosch PKP 18 E Glue Gun Strong Heavy Duty Professional Bamboo Plant Support Garden Canes | 2ft - 10ft
Stanley Junior Hacksaw 0 15 218 Draper 14145 55 mm Clamp-On Hobby Bench Vice 5 x Richard Burbidge Decorative Wood Stripwood - Pine - 900 x 8 x 8mm Balsa Wood - Giant Pack House of Card & Paper A4 220 gsm Card - Assorted Bright (Pack of 100 Sheets) 100 sheets coloured card mix A4 300gsm thick card Am-Tech A3 Cutting Mat Chartwell A3 Orange Student Graph Pad 50 Sheets (1, 5 & 10mm Grid Paper) J13B 4 PVA Glue Washable Adhesive School Home Crafts Non Toxic Wood Paper Fabric Art Bosch PKP 18 E Glue Gun Strong Heavy Duty Professional Bamboo Plant Support Garden Canes | 2ft - 10ft