Question

` Q-12 Explain the universal law of gravity and its calculation from as well as the value of G.`​

Answer 1

Answer:

The force is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. In equation form, this is F=GmMr2 F = G mM r 2 , where F is the magnitude of the gravitational force. G is the gravitational constant, given by G = 6.673 × 10−11 N·m2/kg2.

Answer 2

Explanation:

g is the local acceleration due to gravity between 2 objects. The unit for g is m/s^2 an acceleration.

You get this value from the Law of Universal Gravitation.

Force = m*a = G(M*m)/r^2.

Here you use the radius of the earth for r, the distance to sea level from the center of the earth, and M is the mass of the earth

Hope it helps....