Newtons Law of Gravitation & Gravitational Acceleration, Gravitation (Physics) Video Lecture - Class 11 | Best Video for Class 11

hello sweets today we are going to start
the new chapter gravitation
Newton's universal law of gravity
let they are two point massive
of mass m1 and m2 separated by a
distance R
then force of attraction between these
two masses according to Newtons low
force of attraction
between two morrow is directly
proportional to
No
their muscles
we can write f hoes of attraction is
directly proportional to product of
masses it means M one and M
again force of attraction
is inversely
proportional
the square
we're of distance between them
so that we can write half is directly
proportional to 1 upon R square or we
can say half is inversely proportional
to square of the distance between them
from first and second
from first and second half proportional
to m1 m2 upon r square + f is equal to G
m1 m2 upon R square
where g is
universal gravitation constant
and value of G is 6 point 6 7 into 10
raised to the power minus 11 Newton
meter square upon kg square unit can be
calculated by the formula by the above
formula f is equal to g m1 m token r
square so that g will be equal to F R
square upon m1 m2 and unit of F is
Newton and r square meter square Newton
meter square upon M one and M to M who
that is kg squad
and between new masses if one of them is
the earth force of gravity
one of them is our
a small mass m splashed on the earth
and mass of the earth is capital and
then force between the earth and the
mass is given by from above example from
Newton's first law f is G and small amp
upon a spy because here r is the
distance between the center of mass and
the center of the earth and then center
of the mass this poses the directional
quantity it is vector quantity it is can
it can be represented by the vector
notation G upon a square minus r k- for
attraction because this post is only
attractive force oh sorry points do
gravitational force elit adam facility
after the part you can we have studied
earlier in 9th class and distillation
this lecture is for the expert or we can
say for idea super cut it competitive
exam tus compras advanced language mr.
Bostick to respond the other you great
lorraine now come to the gravitational
acceleration or acceleration of gravity
gravitational acceleration it is equal
to the force per unit mass
or we can say gravitational force per
unit mass gravitational force
gravitational force per unit mass it
means G gravitational acceleration G
will be equal to F upon n and we know
that g is equal to 1 by M F is G M upon
G and upon R square cross M by M so G
will be given by
gmm on our squad
the value of G always remains the same
that is six point six seven and s to the
power minus eleven mass of the earth is
approximately 6 into 10 raised to the
power 24kg and radius is six point four
into 10 to the power 6 meter soo-ji is
given by g is equal to nine point eight
meter per second square at the surface
of the earth
now come to the factors affecting the G
first of all effect of ID
it means if the body is at any height
from the surface of the earth let this
is the
and bodies here mass of the bodies and
mass of the earth is capital and its
distance problem its high from the
earth's surface is H and radius of
artists capital R then daughter distance
will be a plus I we know that
gravitational acceleration at art
surface g s equal to G M upon our squad
we have discussed earlier and G edge
gravitational acceleration head till gh
is given by g is constant mass of the
earth is constant here our closets and
all square
and come present between these two G H
by G as ash means surface of the earth
will be equal to GM upon our cluster
a born
r square that is R square upon R plus X
whole square because cross GM by GM that
is equal to r square r square can be
taken as former 1 plus 1 plus h upon r
whole square that is 1 upon 1 plus h
upon r whole square so you can write g s
will be equal to 1 plus h upon our rest
to the power minus 2 and according to
binomial theorem it is equal to 1 minus
2h upon our so G H will be equal to G as
1 minus it is implies g h is less than g
s gravitational acceleration at the
height of edge chris has been GS soon
when
we go at any height
from the surface of the
g will increase
you