Asked by Phil
You and your friend are talking on a string telephone that is 14 m long. Each of you pulls on the string with about 9 N of force, meaning that the string tension is 9 N. The string has a mass density of 1.2 g/m. How long does it take for your voice to reach your friend through the telephone?
I tried to use this equation but I don't know if its the right equation and got confused
v=sqrt(tension force/mass per unit length)
I tried to use this equation but I don't know if its the right equation and got confused
v=sqrt(tension force/mass per unit length)
Answers
Answered by
bobpursley
you have the right formula, change g/m to kg/m
1.2g/m=.0012
v=sqrt(9/.0012)= about 86m/s
1.2g/m=.0012
v=sqrt(9/.0012)= about 86m/s
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