State universal law of gravitation. Why is it called
so? Derive an expression for gravitational force
between 2 bodies. State value of 'G' on surface of
earth.
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Universal Law of Gravitation : It states that the force of attraction between two
bodies is directly proportional to the
product of their masses and inversely proportional to the square of the
distance
between them.
Let the two bodies 'A' and 'B' be of masses 'M' and 'm' respectively,
which are separated by a distance According
to Universal Law of Gravitation,
F=GM∗m²
Where, 'G' is called universal gravitation constant.
The numerical value ofG=6.67×10
−11
Nm²kg².
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