Two Planets Have the Same Free-Fall Acceleration on the Surface,but $\sqrt { 2 }$

question 96

Multiple Choice

Two planets have the same free-fall acceleration on the surface,but planet B has twice the mass of planet A.If planet A has radius r,what is the radius of planet B?

• A)r/ \(\sqrt { 2 }\)
• B)r
• C)r \(\sqrt { 2 }\)
• D)4r
• E)2r

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