Dear Revered Members,
The definition for Gravitational potential at a point is " The work done in bringing the unit mass from infinity to that point". My doubt is " Since force of gravity is attractive, why should we do some some external work in bringing the body from infinity to the said point". Won't it not the body get attracted towards the surface of the earth by virtue of attractive force?
If we have to move the body from a point near the surface of the earth to some infinite distance, we have to do some external work against the attractive force of gravity.
Can i get some clarification in this regard?
The definition for Gravitational potential at a point is " The work done in bringing the unit mass from infinity to that point". My doubt is " Since force of gravity is attractive, why should we do some some external work in bringing the body from infinity to the said point". Won't it not the body get attracted towards the surface of the earth by virtue of attractive force?
If we have to move the body from a point near the surface of the earth to some infinite distance, we have to do some external work against the attractive force of gravity.
Can i get some clarification in this regard?