(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A crest is created on a string by vibrating it. The crests have two periods on the string which is 3 m long. At what point will the crest have anaccelerationof zero?

I had gotten this problem from a science competition and really had no idea how to do it. But I assumed that the vibrations would make a sine curve and the place where acceleration is zero would be where [tex] \frac {d^{2}}{dx^{2}} \sin {x} = 0 [/tex]

Thereby I calculated an answer of .75m, but could someone clarify this for me?

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

.75m

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Moving crests

**Physics Forums | Science Articles, Homework Help, Discussion**