Energy when two opposite pulses meet

  • Thread starter Thread starter jd12345
  • Start date Start date
  • Tags Tags
    Energy
AI Thread Summary
When two opposite pulses meet out of phase, they cancel each other out, resulting in no displacement of the string at that point. This leads to a temporary state where the energy appears to be conserved but is not manifested as either potential or kinetic energy since the string remains stationary. The confusion arises from the understanding of energy forms, as potential energy typically requires displacement from equilibrium. The discussion highlights the importance of energy conservation principles in wave interactions. Ultimately, the meeting of the pulses illustrates a complex interplay of energy that may not be easily categorized in traditional terms.
jd12345
Messages
251
Reaction score
2

Homework Statement


Two pulses moving in opposite direction meet at a point. Both are out of phase. What will happen to their energy?


Homework Equations





The Attempt at a Solution


Well i know the string will go blank. Their amplitudes will get cancelled. But what kind of energy will remain? Energy should remain conserved.
Well when the two pulses meet the string doesn't move up or down so i suppose its purely potential energy but i don't udnerstand this . Potential energy is present when the string is dispalced from its psotion but in this case string is not at all dispalced so how can it have potential energy?

So perhaps its purely kinetic energy but then again string is not moving...(im confused)
 
Physics news on Phys.org
anyone?
 
TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
Back
Top