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Assume that the Earth attracts John Glenn with a gravitational force F at the surface of the Earth. When he made his famous second flight in orbit, the gravitational force on John Glenn while he was in orbit was closest to which of the following? 

(A) 0.95F 

(B) 0.50F 

(C) 0.25F 

(D) 0.10F

(E) zero

1 Answer

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Best answer

Correct option (A) 0.95F

Standard orbital altitudes are not a large percentage of the radius of the Earth. The acceleration due to gravity is only slightly smaller in orbit compared to the surface of the Earth.

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