Calculating Power Transmitted in a String

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SUMMARY

The discussion focuses on calculating the average power transmitted by a string using the formula P = 1/2*mu*omega^2*A^2*v. The mass of the string is given as 1.47 kg for a length of 175 m, leading to a linear mass density (mu) of 0.0084 kg/m. To find the amplitude (A) and angular frequency (omega), participants suggest using the wave equation y(x,t) = A*cos(kx - ωt + ∅), where omega is the coefficient of time and amplitude is the coefficient of cosine. Understanding tension is also highlighted as crucial for determining the velocity (v).

PREREQUISITES
  • Understanding of wave mechanics and string dynamics
  • Familiarity with the wave equation y(x,t) = A*cos(kx - ωt + ∅)
  • Knowledge of linear mass density calculations
  • Basic principles of tension in strings
NEXT STEPS
  • Study the derivation of the wave equation and its components
  • Learn about calculating tension in strings and its effect on wave speed
  • Explore the relationship between amplitude, frequency, and power in wave mechanics
  • Investigate practical applications of power transmission in strings
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Students in physics, particularly those studying wave mechanics, as well as educators and anyone involved in solving problems related to power transmission in strings.

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Homework Statement


Calculate the average power transmitted by the string. Data: mass of a 175 m long piece of the string is 1.47 kg

Homework Equations



P = 1/2*mu*omega^2*A^2*v

v- velocity
A- amplitude


The Attempt at a Solution




mu = m/L = 0.0084 kg/m


I don't know if there's a way to get A and omega. Do I need to get tension to find speed?

Thanks
 
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Just created an account to answer this. I'm working on the same question now, you should have also been given an equation of the form y(x,t)=Acos(kx-ωt+∅). The co-efficient of t is your omega and the co-efficient of cos is your amplitude. Hope this helped.
 

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