Question

(a) State Newton’s law of gravitation. Obtain an expression for the gravitational force between two mass bodies.
(b) What is the value of G? Also, write its S.I. unit.

Answer 1

Answer:

Newton's law of gravitation states that every object having mass attracts any other object having mass which is directly proportional to the product of masses of the objects and inversely proportional to the square of rate of separation between them.

F=Gm*m2

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(r) 2

value of G = 6.67*10 raise to power -11........ ...

S.I . unit is newton per kilogram

Answer 2

EXPLANATION:

NEWTON'S LAW OF GRAVITATION :

It state that the force of attraction between two masses is directly proportional to the product of their masses and inversely proportional to the square of distance between them.

EXPRESSION :

Let two masses m1 and m2 seperated by distance r.

Now according to NEWTON'S LAW OF GRAVITATION...

F is directly proportional to product of their masses.

F is inversely proportional to the square of distance between them.

F=Gm1m2

–––––––

r^2

Value of G =6.67*10^-11

SI UNIT:

Newton per kilogram square meter square