Pulse pass medium 1 to medium 2 Problem

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SUMMARY

The discussion focuses on the transmission of a pulse from a thin rope to a thicker rope, specifically analyzing the effects of differing linear densities, with μ1 = 0.316 g/m for the thin rope and μ2 = 1.85 g/m for the thick rope. The pulse length of 28.7 cm is established as half the wavelength in the thin rope, leading to a calculated wavelength of λ1 = 57.4 cm. Key conclusions include that tension remains consistent across both ropes when in mechanical equilibrium, and the frequency of the pulse does not change when transitioning to a denser medium.

PREREQUISITES
  • Understanding of wave mechanics, specifically pulse propagation in different media.
  • Familiarity with linear density concepts in physics.
  • Knowledge of the wave equation v = √(T/μ) and its application.
  • Basic principles of mechanical equilibrium in physical systems.
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  • Study the effects of tension on wave speed in different materials.
  • Learn about the relationship between frequency and wavelength in wave mechanics.
  • Explore the concept of mechanical equilibrium in various physical systems.
  • Investigate the implications of linear density on wave propagation in ropes and strings.
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Students and educators in physics, particularly those focusing on wave mechanics, as well as engineers and researchers dealing with material properties and wave transmission in different media.

MMONISM
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Homework Statement


A pulse of length 28.7 cm is transmitted from a thin rope to a thicker rope. If the thin rope has a linear density μ1 = 0.316 g/m and the thick rope has a linear density μ2 = 1.85 g/m what is the length of the pulse in the thicker rope?
Thin_rope_thick_rope-1.jpg

Homework Equations


##v=\sqrt{\frac{T}{μ}}##
##v =λf##

The Attempt at a Solution


λ1 = 57.4 cm
##λ1*f=\sqrt{\frac{T}{μ1}}##
but i am not sure if the tension at thin rope same with the tension at thicker rope? could someone give me some ideals please? Thanks in advance.
 
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Suppose that the tension in the thin rope is higher than the tension in the thick rope. What will happen to the ropes?
 
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DEvens said:
Suppose that the tension in the thin rope is higher than the tension in the thick rope. What will happen to the ropes?
I think if the tension in the thin rope is higher than the tension in the thick rope during the passing process, then the rope will accelerate? but in fact it doesn't? therefore tension in these two mediums is constant? is this correct?
 
If you pull on one end of a rope, what will the tension be in the middle of the rope compared to the tension near the end you are pulling on?

Will it make any difference if the rope has different thicknesses?
 
DEvens said:
If you pull on one end of a rope, what will the tension be in the middle of the rope compared to the tension near the end you are pulling on?

Will it make any difference if the rope has different thicknesses?
Yes, I understand now, which means in any situation, if the ropes is at mechanical equilibrium, the tension in the rope is consistent no matter the properties of the rope. Thank you very much.
 
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Could I ask how to calculate λ1 = 57.4cm?
 
Joy Wong said:
Could I ask how to calculate λ1 = 57.4cm?
pulse length = 28.7 cm = 1/2 wave length
 
Does the frequency change when the pulse passes to the denser medium? Why or why not, i don't really understand.
 

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