Gravitation
Class 11 · Gravitation
Gravitational Field Lines
g points always toward masses — single mass and binary system fields.
Key Notes
01
Field lines point in the direction of the gravitational field g — always toward masses (always attractive).
02
Density of lines is proportional to |g|. Lines start at infinity and end on masses.
03
Lines never cross — at each point g has a unique direction.
Formulas
Point mass field
Negative sign = attractive.
Important Points
Unlike electric fields, gravitational fields have no sources of repulsion (no negative mass).
For two equal masses, midpoint field is zero — saddle point.
Gravitational Field Lines notes from sciphylab (also known as SciPhy, SciPhy Lab, SciPhy Labs, Physics Lab). Class 11 physics revision for JEE Mains, JEE Advanced, NEET UG, AP Physics 1/2/C, SAT, and CUET-UG.