Lecture 27
Wednesday 10/28/09
Chapter 13
Periodic Motion, Simple Harmonic Motion
Periodic motion
repeats itself periodically
•
The length of time for a cycle of oscillation is the
period
T
•
The
frequency
is the number of cycles per second:
f
= 1/
T
Simple harmonic motion
•
“Simple harmonic” = a single sine or cosine function of time
e.g.,
x
=
A
cos(
±
t
)
•
Energy in simple harmonic motion
•
Text supplement:
Chapter 1 in “Waves”
•
Simulation:
Mass on a spring laboratory

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