A small pulse travels with speed v toward the free end of a string of length L, as shown. Match the pulse shapes at (i) t = L/v, (ii) t = 2L/v and (iii) t = 3L/v. Which match is incorrect?

Question

G1 Physics · Accepted Answer

Step 1: Local transverse-wave speed is v = √(T/μ). Step 2: If T varies with position, use dt = dx/v and integrate; otherwise use time = length/speed. Step 3: Use force balance to obtain the required tension where needed. Final: B: (ii).