Q.You are sitting next to your friend on ground. Is there any gravitational force of attraction between you two? If so, why are you not coming together naturally? Is any force other than the gravitational force of the earth coming in picture?

[!TLDR] Yes, there is a genuine (but extremely tiny) mutual gravitational attraction between you and your friend; you don't come together because it is utterly negligible compared with other forces (friction, normal reaction) resisting any motion. [!ANSWER] Yes, a tiny …

Yes -- ANY two masses exert a mutual gravitational force of attraction on each other, $F=\frac{Gm_1m_2}{r^2}$, and you and your friend, both having mass, are no exception. However, for two ordinary human-sized masses (tens of kilograms) separated by even a small distance, this force is astronomically tiny -- vastly smaller than, for instance, the frictional force resisting any sliding motion between your body and the ground, or the normal reaction holding you both in place. This is exactly analogous to the worked example (4.5.1) showing that mutual gravitational attraction between two 300 kg sumo wrestlers 0.5 m apart is negligible compared to their weight due to the Earth. So you are not 'coming together' because the mutual gravitational pull, while genuinely present and non-zero, is many, many orders of magnitude too weak to overcome the friction/normal-reaction forces already keeping you both in place. No force OTHER than gravity is drawing you together (there's no reason for any …

Apply Newton's law of gravitation to estimate the (extremely small) mutual force between two human masses, and compare its scale against the resistive forces …

Concluding gravity is entirely ABSENT between ordinary objects rather than correctly recognising it is present but n …