Calculating Density: Answers Explained

[dinhjeffrey]

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

 

[dinhjeffrey]

nvm answer is 200N, close this thread please