A ball of mass 4 kg and density 4000 kg m`""^(-3)` is fully immersed in water. The density of is `10^3 kg m^(-3).` Find the buoyant force exerting on the ball. Take `g=10 ms^(-2)`

Answer

10N

Explanation

The buoyant force acting on the ball
= Weight of water displaced by the ball
`=(m_(w))g`
`=(g_(w)V_(w))g`
`=(g_(w)V)g ("Here "V_(w)=V="Volume of ball")`
`=g_(w)(m/g)g`
`=10^(3)xx((4)/(4000))xx10`
=10N