State whether the following statement is True or False:
All objects attract each other along the line joining their centre of mass.

Newton's law of gravitation is called a universal law. Why?

$(i)$ How is the force of attraction dependent on the masses of objects and the distance between them?
$(ii)$ The mass of the Earth is $6 \times 10^{24} \, kg$ and that of a natural satellite is $6.5 \times 10^{20} \, kg$. If the distance between them is $3.35 \times 10^{6} \, km$, calculate the force exerted by the Earth on it. $(G = 6.7 \times 10^{-11} \, Nm^{2} kg^{-2})$

Which of the following is the evidence to show that there must be a force acting on the earth and directed towards the sun?

State the universal law of gravitation. How is the force between two bodies affected if the distance between them is tripled?

Calculate the force of gravitation between two objects of masses $10 \; kg$ and $20 \; kg$ at a distance of $10 \; m$ from each other. $\left[G = 6.67 \times 10^{-11} \; Nm^2 kg^{-2}\right]$