A ball of mass m is floating with 1/3rd of its volume inside the water. what is the force required to put on it so that the ball gets completely submerged? PLEASE VERY URGENT!
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Consider mass of the body be M and volume v.
weight of the body =Mg which is bounced by Buoyant Force
Let density of the two liquid be ρ1 & ρ 2 . (ρ 1 =1 g/cc for water)
n first liquid only 2v/3 in immersed (water)
so, Mg= 2v / 3 ρ1 g→(10 [Buoyant force = weight of liquid displaced]
similarly for liquid (2), v/4 in immersed
Mg= 8v /4 ρ2 g→(20 [volume Immersed =volume -volume outside]
Comparing (1) & (20 ]
2v /3 ρ1 = v/4ρ2
⇒ ρ2=8/3 ρ1 as in water ρ1 =l g/cc
ρ= 8 /3g/cc
hope it helps
tq
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