(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A 1750-N irregular beam is haning horizontally by its ends from the ceiling by two vertical wires (A and B), each 1.25m long and weighing 2.50N. The center of gravity of this beam is one third of the way along the beam from the end where wire A is attached. A) If you pluck both strings at the same time at the beam, what is the time delay between the arrival of the two pulses at the ceiling? B) Which pulse arrives first?

2. Relevant equations

T_a + T_b = 1750

Sum of all forces = 0.

wave speed = sqrt(force/linear mass density)

C_g is L/3 from A and 2L/3 from B

3. The attempt at a solution

I really just have hit a logical block and have no idea what to do.

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L = 1.25

m = .255

mu = mass/length = .204

To find the force I tried: T = F * L/3

with F = 1750, a guess, really

1.25*1750/3 = 729.1666

Now I can't decide what to do with that number or even if it is acorrectanswer.

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# Homework Help: Irregular beam physics homework

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