Question on: JAMB Physics - 1992
The equation of a wave is y = 0.005 sin[x(0.5X - 200t)] where x and y are in meters and t is in seconds. What is the velocity of the wave?
A
4000ms-1
B
400ms-1
C
250ms-1
D
40ms-1
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Correct Option: B
y = 0.005 sin[x(0.5X - 200t)]
compare to Y = A sin(kx - wt)
(\lambda) = (\frac{2\pi}{k}) and F = (\frac{w}{2\pi})
V= (\lambda)F
= (\frac{2\pi}{0.5}) x (\frac{200}{2\pi})
= 400ms-1
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