Calculating Wave Speed: Pier Fishing Observation

In summary, the person fishing observed four crests passing by in 7.35 seconds with a distance of 7 meters between each crest. Using the equations f = 1/T and v = f*d, the speed of the wave was calculated to be approximately 2.86 m/s. However, the timing of the waves starts with the first and ends with the fourth, so the correct calculation should use v = λ*f, resulting in a speed of 3.81 m/s.
  • #1
JJones_86
72
0

Homework Statement


A person fishing from a pier observes that four crests pass by in 7.35 s and estimates the distance between two successive crests as 7 m. The timing starts with first crest and ends with fourth crest. What is the speed of the wave?


Homework Equations


f = 1/T
v = f*d

The Attempt at a Solution


T = 7.35s/4 = 1.8375
F = 1/T = 1/1.8375 = .544218
V = .544218 * 7m = 3.81

Can someone tell me what I'm doing wrong? Thanks!
 
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  • #2
try using v=λ*f
 
  • #3
Thats what i did...
V = .544218 * 7m

isnt λ = .544218?
 
  • #4
oh right, well i got v=2.86 m/s
 
  • #5
The problem states the timing starts with the first and ends with the fourth wave.
 
  • #6
yeah precisely. you have to read the question carefully.
 

1. How do you calculate wave speed while pier fishing?

To calculate wave speed while pier fishing, you will need to observe the time it takes for a wave to pass a fixed point on the pier. Measure the distance between two consecutive wave crests and divide it by the time it took for the wave to pass. This will give you the wave speed in meters per second.

2. What factors can affect wave speed while pier fishing?

There are several factors that can affect wave speed while pier fishing, including wind speed, water depth, and the shape and size of the pier. The angle of the pier in relation to the waves can also impact the speed.

3. How do you accurately measure wave speed while pier fishing?

To accurately measure wave speed while pier fishing, it is important to take multiple measurements and calculate an average. This will help to account for any variations in wind speed or wave size. Additionally, using a stopwatch or timer with precision can help to ensure accurate measurements.

4. Why is it important to calculate wave speed while pier fishing?

Calculating wave speed while pier fishing can help you understand the conditions and predict the movement of the waves. This can be useful for determining the best times to fish and the types of fish that may be present in certain wave conditions.

5. Are there any safety precautions to keep in mind when calculating wave speed while pier fishing?

Yes, it is important to always prioritize safety when conducting any scientific observations while pier fishing. Be sure to stay a safe distance from the edge of the pier and always be aware of your surroundings. If the waves are too strong or there is a risk of falling, it may be best to postpone the measurements until conditions are safer.

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