Question

state Newton Universal law of Gravitation and derive the relation for gravitational force between two lines ?​

Answer 1

Answer:

Newton’s universal law of  gravitation  states that every particle of  matter in  this universe attracts every other  particle with a force. This force  is directly  proportional to the product of their masses  and inversely  proportional to the square of  the distance between the centers of these  masses. The direction of the force acts along  the line joining the masses.

Derivation of the relation for gravitational force between two lines:-

Let, $m_{1}$ and $m_{2}$ be the masses of two bodies  A and B placed r metre apart in space

Force F ∝ $m_{1}$ × $m_{2}$

          F ∝ $\frac{1}{r^{2} }$

On combining the above two expressions

F ∝  $\frac{m_{1} m_{2} }{r^{2} }$

F =   $\frac{G m_{1} m_{2} }{r^{2} }$

Where G is the universal gravitational  constant. Its value in SI unit is

$6.674* 10^{-11} Nm^{2} kg^{-2}$