speed of a transverse wave in srting

1. The problem statement, all variables and given/known data

A 2 kg block hangs from a rubber cord, being supported so that the cord is not stretched. The unstretched length of the cord is 0.5m, and its mass is 5 g. The "spring constant" for the cord is 100N/m. The block is released and stops momentarily at the lowest point.



a- Determine the tension in the cord when the block is at this lowest point.

b- What is the length of the cord in this "stretched" position ?

c- If the block is held in the lowest position, find the speed of a transverse wave in the cord.



2. Relevant equations



F=kx, v=√(T/μ)



3. The attempt at a solution

a- T=2g =19.6 ms^-2 correct answer: 39.2 N

b- x=19.6/100 correct answer: .892 m

c- v=√(19.6/.01)=44.3 m/s correct answer: 83.6 m/s