Homework Help: physics....

Posted by khevna on Tuesday, May 15, 2012 at 7:04pm.

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

physics.... - Elena, Wednesday, May 16, 2012 at 4:05am
Spherical planet B has mass (?????) and radius 2r.
physics.... - PhysicKid, Monday, May 28, 2012 at 8:21am
the mass is m/2, or b.

what will be the answer?

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