P and Q are two moons of equal densities orbiting a planet
PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
P and Q are two moons of equal densities orbiting a planet. The orbital radius of P is twice the orbital radius of Q. The volume of P is half that of Q. The force exerted by the planet on P is F. What is the force exerted by the planet on Q?
(A) F
(B) 2F
(C) 4F
(D) 8F