Tie identical weights to two strings of different lengths. Tie two different weights to a string. Tie identical weights to a long string. Tie two different weights to two identical strings.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Choose the investigation that would best answer the question: Does the length of a string change how fast a pendulum swings?
Possibilities:
- Tie identical weights to two strings of different lengths.
- Tie two different weights to a string.
- Tie identical weights to a long string.
- Tie two different weights to two identical strings.

Tie identical weights to two strings of different lengths.