Physices help about increase in velocity?

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

Sounds off to me.

Since the period (T) = 2pi*sqrt(L/g), if you shorten the string length (L) you shorten the period. A shortened period will cause more swings over a given time.

Try it again.