Eng Phys Homework-cx dent/Assignnment-Responses/lastdep- 16094670 ,-7 14 points

Question

Eng Phys Homework-cx dent/Assignnment-Responses/lastdep- 16094670 ,-7 14 points SerPSET9 16 P029 Tension is maintained in a string as in the figure below. The observed wave speed is v- 27.5 m/s when the suspended mass is m -3.00 kg (a) What is the mass per unit length of the string? kg/m (b) What is the wave speed when the suspended mass is m-1.55 kg? m/s Need Help? Resd Suppose a motion picture film is projected at 27.0 frames per second. Each frame is a photograph 15.0 man high. At what constant speed does the tim pass into the projector? m/s Need Help? A sinusokdal wave in a rope is desoribed by the wave function

Explanation / Answer

Wavespeed in a taut string, v = (T/)1/2

=> = T/v2 = mg/v2 = 3.00 * 9.81 / 27.52 = 0.039 kg/m

For m = 1.55 kg,

v = (mg/)1/2 = (1.55 * 9.81 / 0.039)1/2 = 19.7 m/s

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