Question

State one phenomenon related to universal law of gravitation.

Answer 1

1. Universal law of gravitation: The law states that every object in the universe attracts every other object with a force which is directly proportional to the product of their masses and inversely proportional to the square of distance between them.

2. Mathematically it is represented as follows :

$F=\frac{G{m}_1{m}_2}{R^2}$

where $F\to$gravitational force

$G\to$universal gravitational constant

$m_1\to$mass of body 1

$m_2\to$mass of body 2

$R\to$distance between body 1 and body 2

3. Phenomenon related to the universal law of gravitation :

1. Gravitational force is responsible for keeping the earth in its orbit around the sun.
2. Tides formed in the sea are due to the gravitational force of attraction of the moon and sun on the seawater.
3. The revolution of satellites around the planets is due to this gravitational force.