Question

State the universal law of gravitation?

Answer 1

According to the universal law of gravitation:

1. Every object in the universe attracts every other object with a force known as the gravitational force of attraction.
2. The magnitude of the force is directly proportional to the product of their masses (m). i.e.,$F\alpha m_1{m}_2..............\left(a\right)$
3. The magnitude of the force is inversely proportional to the square of the distance (r) between them. i.e., $F\alpha \frac{1}{r^2}..............\left(b\right)$
4. From equations (a) and (b) we get, $F=G\frac{m_1{m}_2}{r^2}$., where G= Universal gravitational constant.
5. The value of $G=6.67\times {10}^{-11}N{m}^2/k{g}^2$.

Hence, every object in the universe attracts every other object with a force known as the gravitational force of attraction, whose magnitude is $F=G\frac{m_1{m}_2}{r^2}$. This is a universal law of gravitation.