a. Explain why the momentum of the section of string highlighted in the figure increases. Determine the rate of change of this momentum through the mass of a unit of length of the string ρ, the deformation in the bending region ε≪ 1 and the rate of displacement of the bending region c.
b. What is the sum of the forces acting on the section of string highlighted in the figure if its tension force is equal to F0? Express the rate of displacement of the bending region of the string through F0 and ρ.
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