PLEASE tell me why!!! refer to a ball that is tossed straight up from the surfac

Question

PLEASE tell me why!!!

refer to a ball that is tossed straight up from the surface of a small, spherical asteroid with no atmosphere. The ball rises to a height equal to the asteroid's radius and then falls straight down toward the surface of the asteroid. The acceleration of the ball at the top of its path is at its maximum value for the ball's flight equal to the acceleration at the surface of the asteroid equal to one-half the acceleration at the surface of the asteroid equal to one-fourth the acceleration at the surface of the asteroid zero

Explanation / Answer

a = GM/R2

a' = GM/4R2

a' = a/4

so, D

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