A solid of lead has mass `M` and radius `R.A` spherical hollow is dug out from it
Channel: Doubtnut
Date: 2020-04-12

A solid of lead has mass `M` and radius `R.A` spherical hollow is dug out from it (see figure) its boundary passing through the centre and also touching the boundary of the soild sphere Deduce the gravitational force on a mass m placed at `P` which is distant r from `O` along the line of centre .