Question

a physical pendulum was created by attaching a 17 cm pencil to a 20 cm long string and in the first case I got a frequency of 1.31 Hz . In the second case with a different center of mass and the same string length I got 1.06 Hz which was quite different.

1. Compare the frequencies of them and explain why they are different?

However when I extended the length of the string to 60 cm the frequency in the first center of mass was 0.72 Hz and 0.74 Hz when the center of mass was changed.

2. Compare the values and explain why they are more similar now?

3. find the mass of the object?

Answer 1

honestly I can't get the mass of the object. Sorry for that and thank you