Oh no, I need serious help!

  • Thread starter axeeonn
  • Start date
  • #1
I have this problem due tomorrow, well technically today, and I'm having trouble with it. It askes...

A rope of total mass m and length L is suspended vertically with mass M at the end. Show that the time for a transverse wave to travel the length of the rope is...

t = 2[squ](L / mg)*[[squ](M+m) - [squ](M)]

I start out with t = L/v
where v = [squ](T/[mu]) T being tension and [mu] being mass per unit length

So, t = L/[squ](TL/m)

Thats as far as I got :(

The book hints to find an expression for the wave speed at any point a distance x from the lower end by considering the tension in the rope as resulting from the weight of the segment below that point. But i dont know how to turn that into an equation :(
 

Answers and Replies

  • #2
frankR
91
0
Find the tension in the rope.

The rope has a mass M at the end of it, that should help you to find the tension.
 

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