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wheels and axles and inclined planes
website: www.knexeducation.co.uk
Whole Class
 • Askthechildrentotalkabouthowtheymightmove
themselves or heavy objects from a low level to a
higher level.
They may discuss, for example:
* How people reach something much taller than
themselves in a building.
* How people in wheel chairs enter and exit
buildings with high steps.
* How the ancient Egyptians moved heavy blocks
to build the pyramids.
Lesson 5: Ramps
 • Explainhowramps,stairsandladdersare‘tools’that
are used to make it easier to move heavy objects and
people from one level to another. You may want to
sketch Fig. 1 on the board to clarify the discussion.
 • Discusshowladdershavethesteepestslopeand
require the most effort to climb. A long ramp, with a
gentle slope, is much easier to climb, but the distance
you have to travel is much greater than when you use
a ladder.
* Stairs and ladders.
* Ramps.
* They probably used ramps.
Ladder Stairs Ramp
Vertical
Height
Fig. 1
Education
®
32


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