Page 63 -

ACTIVITY

Fill in the gaps using the key words and ideas you have learnt in this unit.

for example, DEFORMATION
wet clay

textbooks nis edu kz
depends on changes in and
material of the object

disappears after
external forces
stop acting

for example, occurs under the effect
rubber of

does not disappear
elastic after forces
stop acting

obeys Hooke’s Law only
kinds of plastic in case of
deformation deformations

torsion
equation of Hooke’s Law:
compression

ACTIVITY

Plot an elastic force vs.
extension graph.

63