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Date: 16-9-2020
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Date: 18-5-2016
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Date: 13-9-2020
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Wave Speed on a String
When a wave travels on a string, the wave speed depends on both the string tension and the mass per unit length μ, or linear mass density. What must the exact formula be? (
is now tension, not torque) Well the units of v are m sec-1 and units of
are N ≡ kg m sec-1 and units of μ are kg m-1. To get m sec-1 from kg m sec-2 and kg m-1 can only be obtained with
Thus we must have
And we can combine with our previous formula, so that the wave speed on a string is .
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