(Negative Average Velocity) Homework

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The discussion centers on interpreting the directionality of velocity in a homework problem involving negative average velocity. The original problem statement is criticized for its ambiguity regarding which direction is considered positive. One participant suggests that the positive direction should be interpreted as north, based on the context provided in the problem. Consequently, a negative average velocity would indicate movement towards the south. Clarity in problem wording is emphasized as crucial for accurate interpretation.
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Thank you for helping! I got it :)
 
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The sign would normally imply a direction but it's not clear to me which direction the problem statement considers to be +ve. It could be east or west for example.

Is that the problem statement as written? If it is then I think it's badly worded but I would take +ve to be north because it says "[+]28.5Km north of jollitown".

That would mean a negative velocity would be heading south.
 

Thread 'Magnitude of buoyant force in fluids of different densities'

The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?
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