Buoyant Physics question?

Question

A buoyant force is measured at 5 lb ft/sec2. When weighted in open air, the ball weighs 3 lb. What is the density of the ball?

Answer 1

I'm assuming that the ball was completely submerged under the liquid, then

V=(Fb )/p
V= volume of the liquid displaced
Fb buoyant force
W - weight of the ball
p - density of the liquid

The ball's density is
pb=W/V
or
pb=(W p)/(Fb )

pb=3p/(5)=0.6p

I hope that helps

since p for water is 62.4 lb/ft^3
then
pb= .6(62.4 lb/ft3)= 37.44 lb/ft^3