Calculating Density: Answers Explained

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SUMMARY

The discussion centers on calculating density using the formula D=M/V, where mass (M) is 5 kg and volume (V) is 2.5 x 10^-2 m³, resulting in a density (D) of 200 kg/m³. The density of water is established at 1000 kg/m³, leading to a buoyant force calculation of 800 kg/m³. The final force (F) is calculated using F=ma, yielding a force of 200 N, confirming the initial calculation despite an initial confusion regarding the answer options.

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Homework Statement


http://img41.imageshack.us/i/1721001.jpg/

#17


Homework Equations


D=M/V
F=ma

The Attempt at a Solution


ball
D=5kg/2.5x10^-2
D= 200
density of water is 1000 kg/m^3
1000-200 = 800 kg/m^3
800 = m / 2.5x10^-2
m= 20 kg
F= ma
F = (20)(10) = 200N
but the answer is E)250N
 
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nvm answer is 200N, close this thread please
 

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