PPT: Gravitation | Science Class 9 PDF Download

 Page 1


G r a v i t a t i o n
Page 2


G r a v i t a t i o n
Gravity is the force that pulls
objects towards each other.
What is Gravity?
Page 3


G r a v i t a t i o n
Gravity is the force that pulls
objects towards each other.
What is Gravity?
Every object in the universe attracts every other object with a
force which is proportional to the product of their masses and
inversely proportional to the square of the distance between
them.
The force is along the line joining the centres of two objects.
Universal Law of
Gravitation
Page 4


G r a v i t a t i o n
Gravity is the force that pulls
objects towards each other.
What is Gravity?
Every object in the universe attracts every other object with a
force which is proportional to the product of their masses and
inversely proportional to the square of the distance between
them.
The force is along the line joining the centres of two objects.
Universal Law of
Gravitation
Universal Law of Gravitation
Let two objects A and B of masses M and m lie at a distance of d
from each other as shown in the figure.
Let F be the force of attraction between two objects. According
to the universal law of gravitation
G is called the Universal
Gravitational Constant.
Page 5


G r a v i t a t i o n
Gravity is the force that pulls
objects towards each other.
What is Gravity?
Every object in the universe attracts every other object with a
force which is proportional to the product of their masses and
inversely proportional to the square of the distance between
them.
The force is along the line joining the centres of two objects.
Universal Law of
Gravitation
Universal Law of Gravitation
Let two objects A and B of masses M and m lie at a distance of d
from each other as shown in the figure.
Let F be the force of attraction between two objects. According
to the universal law of gravitation
G is called the Universal
Gravitational Constant.
Importance
of Universal
Law of
Gravitation
The universal law of gravitation
successfully explained several
phenomena which were believed to be
unconnected:
The force that binds us to the Earth
The motion of the moon around the
Earth
The motion of planets around the Sun
The tides due to the moon and the
Sun