3. Verification of Archimedes Principle - Lab Experiment, Class 9 Science Video Lecture

verification of Archimedes principle
Archimedes principle states that when a
body is totally or partially immersed in
a fluid it experiences enough thrust
equal to the weight of the fluid
displaced that is when an object is
immersed in water it feels lighter the
buoyant force does not depend on the
weight or shape of the submerged object
only on the volume of the immersed part
of the object Archimedes principle can
also be applied to an object of density
greater than that of the liquid if the
density of the object is greater than
that of the fluid the object will sink
if the density of the object is equal to
that of the fluid the object will
neither sink
nor float if the density of the object
is less than that of the fluid the
object will float
in the experimental verification of the
Archimedes principle by immersing an
iron block into tap water and saturated
salty water materials required iron
stand string balance iron block wooden
base digital balance water overflow can
200 ml beaker salt glass rod and spatula
procedure
hang the spring balance from an iron
stand and note the reading of the spring
balance place an overflow can filled
with water on the wooden base now hang
the block from the spring balance and
again note the reading of the balance
place an empty beaker on the digital
balance note the reading of the digital
balance adjust the object holder on the
ion stand to bring the spring balance
with the suspended iron block down into
the overflow can immerse the block fully
in the water
weight of the water displaced from the
overflow can to the beaker is equal to
the loss in weight of the block in water
note down the reading of both the spring
balance and digital balance calculate
the loss of water and upthrust using the
formula loss in weight of the body is
equal to mass of block in air - mass of
block in water multiplied by
acceleration due to gravity up thrust is
equal to volume of block multiplied by
density of water multiplied by
acceleration due to gravity preparation
of saturated salty water take 200 ml
water in a beaker
put some salt in the water and stir well
continue to add salt till some salt is
left undissolved in the water make sure
that you stir the water well after each
addition
fill the overflow can with prepared
salty water place it on the wooden base
place an empty beaker on the digital
balance and note down the reading of the
digital balance hang the iron block to
the spring balance and note its reading
as well adjust the object holder on the
iron stand to bring the spring balance
with the suspended iron block down into
the overflow can fully immerse the Block
in the salty water
salty water displaces from the overflow
can into the beaker note down the
reading of both the spring balance and
the digital balance calculate the loss
of water and up thrust using the formula
loss in weight of the body is equal to
mass of block in air - mass of block in
salt solution x acceleration due to
gravity up thrust is equal to volume of
block multiplied by density of salt
solution multiplied by acceleration due
to gravity it is found that loss and
weight of the body is equal to the up
thrust hence our committees principle is
verified
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