1. Yes, there exists a gravitational force between me and my friend sitting beside each other.
2. The gravitational force between any two objects is given by, \(\vec{F} = G\frac{m_1\,m_2}{r^2}\)
Where,
G = universal gravitational...
Gravitational force caused by different regions of shell can be resolved into components along the line joining the point mass to the centre and along a direction perpendicular to this...