Answer to Question #41540 in Mechanics | Relativity for Laimi
if there is a crest at x=3m at time t, find three other positions of the crest at that instant?
We will think that wave is started form point = 0 (because it doesn`t say in what point it started). If the crest is at x = 3m, that is point x =¼. That`s why the period will be 12m. So with the period 12m the crest will repeat. Answer: So the first three is 15m, 27m and 39m.