Two uniform spherical stars made of same material have radii and
PHYSICS · Single correct · AP · Physics C: Mechanics · Linear Momentum · Linear Momentum
Problem
Two uniform spherical stars made of same material have radii R and 2R. Mass of the smaller planet is m. They start moving from rest towards each other from a large distance under mutual force of gravity. The collision between the stars is inelastic with coefficient of restitution 1/2.
The maximum separation between their centres after their first collision:
(A) 4R
(B) 6R
(C) 8R
(D) 12R