Finding the Distance Fallen and Frequency Shift with Doppler's Effect

  • Thread starter Thread starter blch0901
  • Start date Start date
AI Thread Summary
The discussion focuses on solving a physics problem involving the Doppler Effect and a tuning fork falling from rest. The observer calculates the observed frequency of 487 Hz using the formula for the Doppler Effect, resulting in a calculated speed of 19.01 m/s for the tuning fork. The next step involves using motion equations to determine the distance fallen by the tuning fork to reach that speed. Participants suggest finding the fall time first to facilitate the calculation of the distance fallen. The conversation emphasizes the importance of applying motion formulas to complete the solution.
blch0901
Messages
2
Reaction score
0
Dopplers Effect, Please Help!

Homework Statement



A tuning fork vibrating at 514 Hz falls from rest and accelerates at 9.80 m/s2. How far below the point of release is the tuning fork when waves of frequency of 487 Hz reach the release point? (Take the speed of sound in air to be 343 m/s.)

Homework Equations





The Attempt at a Solution



fobs=[1/((1+u)/343)]*fsource

487=[1/((1+u)/343)]*514
u=19.01 m/s

That's as far as I got. I'm not sure what to do next or if I'm even on the right track. Any help would be appreciated. Thanks
 
Last edited:
Physics news on Phys.org


The formula looks a little odd, but I think the 19 m/s is correct.
Next step is to use motion formulas to find out how far it has fallen to acquire that speed. You might want to find the fall time first.
 

Thread 'Rolling without slipping on a curved surface'

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 .
View full post »

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

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...
View full post »

Similar threads

Doppler effect and acceleration of source
Replies
5
Views
2K
How to Solve a Doppler Effect Problem with a Moving Vehicle and Siren at Rest
Replies
1
Views
1K
Calculating frequency of the second harmonic
Replies
2
Views
2K
Spring and Microphone (Doppler Effect...?)
Replies
7
Views
3K
Doppler effect and beat frequency
Replies
3
Views
2K
Find the speed of the source (Doppler Effect)
Replies
22
Views
6K
Music Mystery: 2(Vsound) for the 2nd Harmonic?
Replies
2
Views
2K
Doppler effect (source and detector moving together)
Replies
4
Views
2K
Determining Distance from Release Point Using Doppler Effect
Replies
6
Views
4K
How to Calculate Distance Using the Doppler Effect
Replies
1
Views
3K

Hot Threads

Recent Insights

Back
Top