Two pulses on a stretched string have centres initially 8 cm apart and move toward each other at 2 cm s⁻¹. After 2 s, what form does the total pulse energy have?

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: Purely kinetic.