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Selina Solutions Class 9 Physics Solutions for Exercise 5A in Chapter 5 - Chapter 5 Upthrust In Fluids Archimedes Principle And Floatation
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A body of density ρ is immersed in a liquid of density ρL. State condition when the body will
(i)float,
(ii) sink, in liquid.
Answer:
(i) The body will float when its density is lesser than or equal to the density of the liquid it is immersed in, that is to say, ρ ≤ ρL
(ii) The body will sink in the liquid when the density of the body is greater than the density of the liquid it is immersed in, that is to say, ρ > ρL
Video transcript
"students welcome to leader learning
this is ashwini i teach science at lido
so here in this question we have to
state that a body of density rho
is immersed in a liquid of density rho
l so we have to state the condition
when the body will float or sink in the
liquid so the answer is
the body will float in the liquid when
its density is lesser or equal to
the density of the liquid so here
as you see in the second image okay the
object will float
and the third image the object will also
float but it is
somewhat inside the water okay not only
surface of water
so these two cases are the row is the
density of object okay or the body
when it is less than the density of
liquid
okay when it is less than the density of
liquid the object will float on the
surface of water
and second cases when the density of
body is equals to
the density of liquid then it will
emerged in body
immersed in the liquid but it does not
completely
sink in the body it will just float in
the
water okay or any liquid
now if i'm talking about the second
condition that when it will going to
sink
when the density of the body
is greater than the density of liquid
so this is the only condition when the
body will sink in the liquid so i hope
rho is greater than rho l here so i hope
everything is clear to you if you have
any doubts then please put it down in
the comment section
for more such video solutions please
subscribe leader learning thank you"
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