Spherical planet A has mass m and radius r. Spherical planet B has mass and  radius 2r. How does the gravitational field strength at the surface of planet B compare to the gravitational field
strength at the surface of planet A?
a) It is the same as planet A
b) It is twice that of planet A
c) It is half that of planet A
d) It is one-eighth that of planet A
2 answers
Spherical planet B has mass (?????) and  radius 2r.
the mass is m/2, or b.
what will be the answer?
what will be the answer?