A. 20 m/s
B. 30 m/s
C. 40 m/s
D. 50 m/s
Correct Answer: Option C
C. 40 m/s
Explanation
From two parts 20m apart
a = 10m, x = 6m, A = 5
V = ω √(A²−X²) = 5 √(10²−6²) = 40m/s
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