Please help.. I'm helping a friend out I don't take Physics please explain! https://gyazo.com/4df044eb7f70ef113f507659ceeebeab

Question

osprey · Answer

0.00109 secs COULD be the answer Enclosed is the working that I've put together. A couple of pages at the end are doodles/mistakes. This question bothers me a little. The point on the wave will be accelerating and decelerating as it moves to and fro. The only way that my calculation works is if I assume that the question is asking for the time over a small distance centred on the centre of the oscillation, if you follow me. In maths terms "the LINEAR" part of the graph. I'd be interested to know ... Bon voyage http://perendis.webs.com

irishboy123 · Answer

the travelling wave function treats x and t as independent-independent variables.

so just set x to zero and solve like that

similarly, set $\phi$ to zero if it gets in your way

it should become a calculator problem.