Chronology Current Month Current Thread Current Date
[Year List] [Month List (current year)] [Date Index] [Thread Index] [Thread Prev] [Thread Next] [Date Prev] [Date Next]

Re: No stiffness effect?

I was wrong (see below). Subsequent student experiments
showed that the measured speed (via single pulse and via
standing waves) was 12% (+/- 5%) higher than what was
expected on the basis v=sqr(T/mu)=sqr(15/0.086) which
leads to 13.2 m/s (+/- 3%). Is the 12% difference due to
stiffness or to something else? The stretched spring was
not exactly horizontal (due to its weight) but the length
was measured along the real ark so that mu was correct.
Ludwik Kowalski

... the measured v of a transverse wave in a spring (stretched
from 3 meters to 9 meters with the tension force of 15 N) was
found to agree (plus or minus about 1 %) with the textbook
formula v=sqr(T/mu). ....