Physices help about increase in frequency?

Question

In a experiment i had to determine how the length of a pendulum affects the time of each swing.

i tried it for 20 seconds i got 40 swings first time and 32 swings when i shorten the string in the same time

does that seem like good results or should I try it again??

Because it sounds off relating back to the formula??? any help, 10 points for good answer

Answer 1

If you shortened the string you should have got faster. Something went wrong in your experiment.

tcw.

Answer 2

Freq as a function of length is given by: ω = √(g/l)

What you're asking is if the freq of the shorter string makes sense with the frequency you got (32 swings).

I am not sure what you are calling a "swing". The term used is a "cycle", which has a specific meaning, which, in this case, would be; when you release the pendulum, it will 'swing' out and then back again. That is one cycle, and that is the number that should be counted....1, 2, 3, 4 cycles, etc

At any rate, based on what you've given, the longer length string should be just a little over 1.5 times the length of the shorter string, which I doubt, but check for yourself. Hopefully thjs will help out.