physics....

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

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asked by khevna
  1. Spherical planet B has mass (?????) and  radius 2r.

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    posted by Elena
  2. the mass is m/2, or b.

    what will be the answer?

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    posted by PhysicKid

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