(a) Define gravitational field strength at a point. (b) State the principle of…
PHYSICS · Subjective · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
(a) Define gravitational field strength at a point.
(b) State the principle of superposition as applied to gravitational fields.
(c) Two isolated point masses are placed on a straight line in otherwise empty space. Explain qualitatively—without performing any calculation—how it is possible for a point to exist on that line where a test mass would experience zero net gravitational field. Indicate the factors that decide the location of such a point.