Kerala Board Solutions for Chapter: Gravitation, Exercise 2: Let us assess

If the distance between two bodies that attract each other is trebled. How many times more will be their mutual force of attraction?

A body, the mass and the weight of which were already determined at the equator, is now placed at the pole. In this context, choose the correct statement from the following:

Mass of Earth is $6\times {10}^{24} \mathrm{kg}$ and that of the Moon is $7.4\times {10}^{22} \mathrm{kg}$. The distance between Earth and Moon is $3.84\times {10}^5 \mathrm{km}$. Calculate the force of attraction of Earth on Moon. ($G = 6.7\times {10}^{-11} \mathrm{N} {\mathrm{m}}^2 {\mathrm{kg}}^{-2}$)

If a body of mass $40 \mathrm{kg}$ is kept at a distance of $0.5 \mathrm{m}$ from a body of mass $60 \mathrm{kg}$, what is the mutual force of attraction between them? ($G = 6.7\times {10}^{-11} \mathrm{N} {\mathrm{m}}^2 {\mathrm{kg}}^{-2}$)

Observe the figure and complete the table. ($G = 6.7\times {10}^{-11} \mathrm{N} {\mathrm{m}}^2 {\mathrm{kg}}^{-2}$)