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6.1 What is deformation?

A yurt is a portable, Force is the reason for a change in the motion of an object. Sometimes
tent-like dwelling. the action of force does not change the motion of the whole object.
Long, curved sticks The action of force can change the motion of the particles the object

(uyks) form the domed consists of. Change of this kind leads to change in the position of the
textbooks nis edu kz
particles relative to each other, which then leads to a change in shape
roof of the yurt. From
or size of the object. We say it leads to deformation. Different kinds of
prehistoric times
deformation include bending, extension and compression:
people used wood from
willow or birch trees to
make the base and the
uyks of their yurts. Why
do you think willow

was used to make the
wooden parts of the
yurt? How do you think ACT Match the different kinds of deformation shown in the images with
the following definitions:
people worked out that
those trees were the а) a straight object becomes deformed
best to use? b) an object becomes longer without disruption

c) the shape of the object is changed and it becomes smaller

There are other kinds of deformation, as shown in the images below:

torsion – Separate layers of the shear – Some layers of the object
object rotate relative to each other shift relative to others. In the case
at an angle. of a large shift, a cut or tear occurs.

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