Page 522 - SUBSEC October 2017_Neat

UNIT 1
MODULE 2: OSCILLATIONS AND WAVES (cont’d)

SPECIFIC OBJECTIVES EXPLANATORY NOTES SUGGESTED PRACTICAL
ACTIVITIES

Harmonic Motion (cont’d)

Students should be able to:
1.2
1.4. use the period of the simple Include springs joined in Determine the period of
pendulum as series or in parallel. oscillating systems, for
example, the use of vertical
= 2√ and of the mass
and horizontal springs and
weights. Use the graphical
on a spring as = 2√ ;
techniques covered in
Specific Objective 1.3 to
record results.

1.5. describe the interchange of Relate displacement-time Use a water or broom
kinetic and potential graphs to the interchange pendulum with sand to
energies of an oscillating of kinetic energy and demonstrate a
system during simple potential energy. displacement-time graph.
harmonic motion;

1.6. calculate the energy of a
body undergoing simple
harmonic motion;

1.7. describe examples of Use graphs to illustrate the
forced oscillations and effect on the amplitude of
resonance; oscillations as the
frequency approaches the
system’s natural frequency.

Discussion on how swaying
high-rise buildings or
skyscrapers are affected by
resonance frequencies and
the impact on their
structural integrity during
an earthquake.

1.8. discuss cases in which
resonance is desirable and
cases in which it is not;

1.9. describe damped Pay particular attention to
oscillations and represent the levels of damping and
such motion graphically; the importance of critical
and, damping.

CXC A16/U2/17 22