Question

Q4. State the universal law of gravitation. Express this law mathematically. What is the SI unit
of G?

Answer 1

Answer:

The constant proportionality (G) in the above equation is known as the universal gravitation constant. The precise value of G was experimentally determined by Henry Cavendish in the century after Newton's death. The value of G is found to be G = 6.673 x 10-11 N m2/kg2.

Answer 2

Answer:

Newton's universal law of gravitation states that when two body are separated by a distance r, then both attract each other with a force which is directly proportional to the product of their masses (m

1

and m

2

) and inversely proportional to the square of distance between them (r). This force is termed as gravitational force.

Mathematically, gravitation force is given by F=

r

2

Gm

1

m

2

where G is gravitational constant.