Page 537 - SUBSEC October 2017_Neat

UNIT 1
MODULE 3: THERMAL AND MECHANICAL PROPERTIES OF MATTER (cont’d)

SPECIFIC OBJECTIVES EXPLANATORY NOTES SUGGESTED PRACTICAL
ACTIVITIES

Mechanical Properties of Materials (cont’d)

Students should be able to:

6.5. relate the difference in the
structures and densities of
solids, liquids and gases to
simple ideas of the spacing,
ordering and motion of
their molecules;

6.6. describe a simple kinetic
model for the behaviour of
solids, liquids and gases;

6.7. distinguish between the Make particular reference to
structure of crystalline and metals, polymers and glasses.
non-crystalline solids;

6.8. discuss the stretching of Hooke’s law.
springs and wire in terms of Spring constant.
load extension;

6.9. use the relationship among Definitions of stress and strain
‘stress’, ‘strain’ and ‘the and Young modulus
Young modulus’ to solve = and = .
problems;

6.10. perform experiments to
determine the Young
modulus of a metal in the
form of a wire;

6.11. perform experiments based For example, copper, glass,
on knowledge of the rubber.
force-extension graphs for
typical ductile, brittle and
polymeric materials;

6.12. deduce the strain energy in See Appendix II for
a deformed material from a suggested practical
force-extension graph; activity.

CXC A16/U2/17 37