Kinematics Question: A motorboat and a log in a stream

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Homework Help Overview

The discussion revolves around a kinematics problem involving a motorboat and a log in a stream. Participants are attempting to analyze the motion of both objects under the influence of the stream's current.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • One participant presents equations related to the velocities of the motorboat and the log but expresses uncertainty about the next steps. Others question the purpose of the log and suggest considering the problem from the river's reference frame. There is also a request for clarification regarding the origin of certain values mentioned in the equations.

Discussion Status

The discussion is ongoing, with participants exploring different interpretations of the problem and questioning the assumptions made. Some guidance has been offered regarding the reference frame, but no consensus has been reached on how to proceed with the calculations.

Contextual Notes

Participants are checking for completeness of the provided information, indicating that there may be missing details that could affect the problem-solving process.

dudu
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Homework Statement
A river flows with a uniform velocity v. A person in a motorboat travels 1.9km upstream, at which time she passes a log floating by. Always with the same throttle setting, the boater continues to travel upstream for another 60.8min and then returns downstream to her starting point, which she reaches just as the same log does. Calculate the velocity of the river.
Relevant Equations
listed below
I found vlog=1.9/t and vb-v=1.15/t and vb+v=d+1.15/60.8 don't know what to do now
 
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What is the purpose of the log, do you think?
 
have you considered trying to solve the question in the reference frame of the river?
 
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Likes   Reactions: PeroK
Welcome, dudu! :cool:

Could you verfy that no originally provided information is missing?
Where that 1.15 and that d and v come from?
 

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