A string is stretched between two points 50cm apart. It is then plucked at its...

WAEC 1989

A string is stretched between two points 50cm apart. It is then plucked at its center and the velocity of the wave produced is 300m/s. Calculate the number of vibrations made by the string in 1s.

A. 3
B. 6
C. 150
D. 300
E. 600

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Correct Answer: Option D

Explanation

λ = 2 x 50 = 100cm = 1m.
V = fλ, f = v/λ = 300.

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A string is stretched between two points 50cm apart. It is then plucked at its...

Correct Answer: Option D

Explanation

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