Answer:
At position A:
The displacement of the wave 1 : x1 = 0.50 m
The displacement of the wave 2 : x2 = -0.30 m
Then, the resultant displacement is x = x1 + x2 = 0.50 m - 0.30 m = 0.20 m
At position B:
The displacement of the wave 1 : x1 = 0.30 m
The displacement of the wave 2 : x2 = -0.30 m
Then, the resultant displacement is x = x1 + x2 = 0.30 m - 0.30 m = 0.00 m
At position C:
The displacement of the wave 1 : x1 = 0.50 m
The displacement of the wave 2 : x2 = 0.30 m
Then, the resultant displacement is x = x1 + x2 = 0.50 m + 0.30 m = 0.80 m
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