A particle of mass M is situated at the center of a spherical shell of same mass and radius a. The gravitational potential at a point situated at a/2 distance from the centre, will be.......

A particle of mass M is situated at the center of a spherical shell of

1.	A particle of mass M is situated at the center of a spherical shell of same mass and radius a. The gravitational potential at a point situated at a/2 distance from the centre, will be.......
Answer» `-(3GM)/a` `-(2GM)/a` `-(GM)/a` `-(4GM)/a` SOLUTION :`implies` Potential energy at GIVEN point = Potential energy at a given point due to shell + potenital energy at given point due to particle `=-(GM)/a+(-(GM)/((a/2)))` `=-(GM)/a - (2GM)/a` `= - (3GM)/a`