can anyone explain me whole chapter of gravitation , and a few problems
Answers
Answer:
So gravitation is basically about the attraction of things towards the center of the Earth .
And , every body attracts another body ( this however is negligible )
Newton stated a law regarding Gravitation which is known as
Newton's universal law of gravitation .
Newton's universal law of gravitation :
Force of attraction = Gm₁m₂ / r²
Here ,
G is universal gravitational constant
m₁ , m₂ are the masses of the two bodies
r is the distance between them .
Value of G is 6.67 ˣ 10⁻¹¹ Nm² / kg
Most of the problems are based on it .
The acceleration with which a body will fall when released from a certain height when under the influence of gravity is termed as
gravitational acceleration [ g ] .
Derivation of gravitational acceleration :
F = m₁a
a = g
F = m₁g
F is also = Gm₁m₂ / r²
this means that ,
F = m₁g = Gm₁m₂ / r²
m₁ gets cancelled on both sides
g = Gm₂ / r²
the value of g varies with height and depth . It decreases as we move up or down .
Value of g on earth = 9.8 m/s²
Hope it helped and please mark as brainliest:)