idea is that we hang a slinky vertically and pull on it. Then we
time how long it takes for ten cycles. We vary the number of coils
that we allow to hang.
coils is the number of coils.
is the time (in seconds) it took for 10 cycles.
What do you expect the the pattern to be? If you have fewer coils,
will the waves be faster, or slower, or the same as with more coils?
If you know about harmonic motion (say, the frequency of a hanging
massless spring with a mass on the end of it), how does
How does the frequency of this "hanging wave" depend
on the number of coils?