At a certain moment, the photograph of a string on which a harmonic wave is travelling to the right is shown. Then, which of the following is true regarding the velocities of the points P, Q and R on the string.

Question

G1 Physics · Accepted Answer

Step 1: For a stretched string, v = √(T/μ) and fₙ = nv/(2L) for fixed ends. Step 2: Use the stated node/antinode or harmonic condition; for composite wires the same frequency must hold on both parts. Step 3: Solve with the given lengths, densities and tension. Final: C: | vP | > | vQ | = | vR |; D: vQ = vR.