4,993
edits
Ancient Egypt: Difference between revisions
→Pyramid building & engineering
| Line 941: | Line 941: | ||
*** they understood the utility of tension and leverage | *** they understood the utility of tension and leverage | ||
*** they understood that an incline, or a ramp, spreads the force required to lift a heavy object across the distance of the incline | *** they understood that an incline, or a ramp, spreads the force required to lift a heavy object across the distance of the incline | ||
<div class="mw-collapsible mw-collapsed | * click EXPAND for excerpt from wikipedia entry on how an incline helps to life heavy objects: | ||
<div class="mw-collapsible mw-collapsed"> | |||
<pre>An inclined plane, also known as a ramp, is a flat supporting surface tilted at an angle, with one end higher than the other, used as an aid for raising or lowering a load. The inclined plane is one of the six classical simple machines defined by Renaissance scientists. Inclined planes are widely used to move heavy loads over vertical obstacles; examples vary from a ramp used to load goods into a truck, to a person walking up a pedestrian ramp, to an automobile or railroad train climbing a grade. | <pre>An inclined plane, also known as a ramp, is a flat supporting surface tilted at an angle, with one end higher than the other, used as an aid for raising or lowering a load. The inclined plane is one of the six classical simple machines defined by Renaissance scientists. Inclined planes are widely used to move heavy loads over vertical obstacles; examples vary from a ramp used to load goods into a truck, to a person walking up a pedestrian ramp, to an automobile or railroad train climbing a grade. | ||
| Line 947: | Line 948: | ||
* Source: [[https://en.wikipedia.org/wiki/Inclined_plane Inclined Plane (wiki)]] | * Source: [[https://en.wikipedia.org/wiki/Inclined_plane Inclined Plane (wiki)]] | ||
</div> | </div> | ||
* sources | * sources | ||
** [http://en.wikipedia.org/wiki/Fourth_dynasty_of_Egypt 4th Dynasty] (wikipedia) | ** [http://en.wikipedia.org/wiki/Fourth_dynasty_of_Egypt 4th Dynasty] (wikipedia) | ||