Discussion
The length of the rod of a certain pendulum is decreased, and the period then decreases by 20%. By how much was the rod length decreased?
*This question is included in 01. Introduction, question #12
| (A) | 20% |
| (B) | ... |
| (C) | ... |
| (D) | ... |
| (E) | ... |
| (F) | ... |
The solution is
Posted: 08/29/2013 09:24
I thought length and time were proportional.
Posted: 08/29/2013 21:24
Ahsia, length is under a square root, so it's not linearly proportional. The explanation is really good. Did you see it?