Two sinusoidal waves with the same amplitude A and frequency f travel in opposite directions along a long string. You stand at one point and watch the string. The maximum displacement of the string at that point is
A. A
B. 2A
C. 0
D. There is not enough information to decide.

The displacement of string at any point is given by sum of displacements of string due to each wave. Two sinusoidal waves are having same frequency and amplitude, these waves are travelling in opposite direction.

Therefore maximum displacement of string at any point = (max. displacement due to first wave) + (max. displacement due to second wave) = A+A = 2A

Two sinusoidal waves with the same amplitude A and frequency f travel in opposite directions along a long string. You stand at one point and watch the string. The maximum displacement of the string at that point is A. A B. 2A C. 0 D. There is not enough information to decide.

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Two sinusoidal waves with the same amplitude A and frequency f travel in opposite directions along a long string. You stand at one point and watch the string. The maximum displacement of the string at that point is
A. A
B. 2A
C. 0
D. There is not enough information to decide.