Question

3. A spherical planet of radius R1 and uniform density pi with a thick spherical cloud of dust (density ρ2 radius R2) is discovered. The astronomers who discovered the planet decided to give it the very intuitive name of "3794 Dusty Planet I b" (a) (2 points) What is the gravity field within the dust cloud? (b) (2 points) What is the force on a particle of mass m placed within the dust cloud?

Classical mechanics, if anyone can answer and explain that would be great.

Answer 1