Unit 12
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Transcript of Unit 12
UNIT 10
STRENGTH and STABILITY
Lesson 1 : I SEE SHAPES
CONE CUBE CUBOID
CYLINDER
HEMISPHERE
SPHERE
PYRAMID
Lesson 2 : STANDING TALL and LYING LOW
There are a numbers of factors which affect the stability of an object.
1. The base area.> The bigger the base area, the more stable the object is.
2. Height> The higher the object, the less stable it is.
3. The materials used.> Example of materials used for construction are concrete, wood, steel and plastic.
BASE AREA
A bottle in an upright position has a bigger base area. It is therefore more stable than a bottle in
an upside down position.
A low stool is more stable than a high stool
height
Materilas used
Concrete is very strong and can be formed into any shape
Wood does not break easily
Steel is the strongest material available
Plastic can be strecthed and pulled