A string is tied at two rigid supports. A pulse is generated on the string as shown in figure. Minimum time after which string will regain its shape: (Neglect the time during reflection)

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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: C: 6 s.