5.6.157 - Gravitational field due to a point mass

Derive and use g = Gm/r² for the gravitational field due to a point mass.

Use - gravitational field due to a point mass to connect the rule to the data and decision in the question.

This matters because - gravitational field due to a point mass determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply - gravitational field due to a point mass to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: - Gravitational field due to a point mass is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.