Particles attract each other - Matter in Surroundings, Force & Laws of Motion, Science, Class 9 Video Lecture

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the other property is that the particles
of the matter actually attract each
other
see to do this let's try to break let's
take iron rod this iron rod let's try to
break it it will be difficult to break
let's try to bring Oden scale little
easy to break let's try to break rubber
you'll feel little different when you
try to break it
let's try to break chalk pretty easy to
break plastic pen difficult to break
pencil easy to break these are easy ones
actually to break because every
different say we see knowing by the
definition all these are minor because
it has mass but when you try to break
them it's not the same game always it's
very difficult to click RN very easy to
break chop why it is because all these
particles of matter at quran each other
and they are binding together only
because of attraction these particles
attract each other and the interaction
actually is the cause of the strength if
you study in higher classes why in some
case the strength is more because
attraction is more in some case the
attraction is less and thus it is the
attraction is lesser here more
attraction so more attraction between
particles okay here it clashes disap
between particles so this is the
attraction actually between the
particles that decides a strength of a
given matter so this also prove that
these particles advantages so what we
have sorry too long matter matter is
anything which has mass it doesn't
the particles these particles are in
constant motion they attract each other
they are very small in size they have
space between them so these all
something we stir it the low so let's do
a recap we understood that matter is
made of particles any matter if you see
is made of particles this particle has
space between them if you see here there
is a space between the particles these
particles are a constant motion if you
see I have made picture like this it
looks like it is moving they are in
constant motion they attract each other
and that's why you see the chalk is
easier to drink iron is harder to bring
and that's why I can say that there is a
force of attraction between these
particles DS and that's ABC diamond is
very strong because it formed structure
it's a form a very complex crystalline
structure and they very huge force of
attraction between them and chalk is
easy to bring because the force of
attraction between the molecules or the
particles is less let's take some
question now which of the following can
madam as I told anything that has vas
this model share do you think chair has
mass yes shear is a matter
air air do ya yes air has mass here is
matter
love love is abstract now love is not
having any mass love is just a feeling
just imagine it imagine anything
smell smell is also actually imaginary
things smell is not a magic hate is also
imagining elements yes it has mass
thoughts do you think any mass with the
thought so imaginary coal during cold
cold is this matter
no cold again when I say things are hot
or cold is just abstract now there is no
mass to it but coal ring is a matter yes
smell of perfume smell is again smell it
doesn't
it is not matter please know love smell
hate thought cold smell again these are
not matter because it doesn't have any
bus yes the reason give the reason for
the following observation the smell of
hot sizzling food reaches you several
meters are able to get the smell from
the cold who you have to go close so the
question says when you enter kitchen and
something your mom is cooking you can
actually smell it but if your food is
prepared last night and it is even kept
under than in table you'll not feel the
smell
why because see when you heat it when it
is hot so any hot the temperature is
what temperature is high temperature is
high that means kinetic energy of
particles is high so let's suppose you
are somewhere here okay so if it is hard
that 90 kg the particle is high and
these particles since it will have high
kinetic energy jump out all this food
and it'll enter your your so since this
particles will enter your nose you feel
the smell okay so but is it is pretty
easy
we know that the particles of the matter
inconstant motion because that articles
always in constantly you may be
surprised to see that even the hard
substance like your pencil or the pen
inside that the particles are actually
in constant motion the motion is little
less in case of solids but they are in
motion way
now as you increase the temperature the
speed of this particles is the guiding
engine this particle increases the speed
of this particle increase
and these particles can easily sure ears
even if you are few metal away and you
can feel the smell the next is a diver
is able to cut to water and so we put
what does what property of matter this
observation show see we have seen that
matter has space between them also there
is a force of attraction main particles
attract each other and try each other in
fact both are complimentary of you will
study in higher classes the more is the
space between them more is the more
space between particles lesson is force
of attraction between particles this is
something you'll see okay in height once
also you can see a clear if you talk
about the gas gas has more space between
the particles study that and the force
of attraction between them is less this
is gas talk about solid the space
between the particle is less and the
force of attraction between them is put
the company in this case also in water
water molecule the space between the
particles is more okay the space between
the particle is mole's the force of
attraction if the particles is also less
and thus the diver can easily break
through easily break through you can cut
through water at leave this is running
tap and if you put your finger between
the water the running water can actually
cut to the world same thing and so he
also actually cut to the water why you
would cut to water because the space
between this
is it less but in the sand you can't
swim because in case of sand the force
of attraction is more but in the
particles you can't swim in the sand but
in case of water in cancer okay
it all depends on the phone you can you
consume in the iron pipe you can't do
that you can't swim on the sand also or
against oil also because it all depends
on the force of attraction in this case
of course my trust in the particles is
less and the size between these
particles is more you can actually cut
through okay so it talks about these two
properties and these two properties are
actually complementary to each other one
of the characteristics of particles of
matter we have seen that characteristic
first is there space between them the
space between them they are in motion
then cause motion and there is an
attraction between these particles right
matter is made of particles and
particles have these properties thank
you
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