The pulse of the figure travels to the right on a string whose ends at x = 0 and x = 4.0 m are both fixed in place. Imagine a reflected pulse that begins to move onto the string at an endpoint at the same time the incident pulse reaches that endpoint. The superposition of the incident and reflected pulses gives the shape of the string.
1. When does the string first look completely flat for t > 0?

2. When is the first time for t > 0 that the string looks exactly as it does at t = 0?

Transcribed Image Text:

y (cm) 10 3 x (m) y (cm) 10 0 0 3 x (m) y (cm) 10 3 x (m) y (cm) 10 0 0 3 x (m)