Summary "Gravitational Forces: A Window into the Cosmos"
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Course
Physics
Institution
Sixth Year / 12th Grade
Book
Physics : Textbook For Class Xi
Gravitation is the natural phenomenon by which physical bodies attract each other with a force proportional to their mass. It is responsible for the motion of celestial bodies in the universe, such as planets orbiting around stars and moons around planets. The force of gravity is described by Newto...
Class notes physics Physics : Textbook For Class Xi
Class notes physics Physics : Textbook For Class Xi
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,Four Fundamental Units
1. Gravitational Force – Between Two Mass
2. Electromagnetic force – between charge
3. Weak Nuclear – Inside nucleus
4. Strong Nuclear – between sub atomic
particle during decay
GRAVITATION
It is a force of attraction between any two
bodies having masses.
m --------m
1 2
GRAVITY
The force of attraction between earth
and any other object near the surface
of earth.
,ACCELERATION DUE TO
GRAVITY (g)
When a body is thrown up, it returns
back to earth’s gravity force of
attraction called gravity and that’s why
we call this acceleration due to
gravity(g).
, NEWTON LAW OF GRAVITATION
According to newtons law gravitation,
the force of attraction between two
object is directly proportional to the
product of their magnitude of their
masses and is inversely proportional to
the square of the distance in between
them.
F m .m 1 2
F
F=
G=
[ = G]
=
G is Universal gravitation constant
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