Convert Problems | Learn How to Solve Them

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The discussion focuses on solving a physics problem related to kinetic energy (KE). The given kinetic energy is 2260 N*m and the mass is 80 kg. Participants are encouraged to use the equation KE = 1/2mv^2 to find the unknown velocity (v). The conversation emphasizes that the solution is within reach, highlighting the importance of applying the correct formula. Overall, the thread provides guidance on tackling kinetic energy problems effectively.
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The Attempt at a Solution

 
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Don't worry! You're almost there! You know that KE = 2260 N*m, m=80kg, you can solve the K.E. =1/2mv^2 equation for the only unknown - v!
 
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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