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If suppose moon is suddenly stopped & then released then acceleration of moon just before striking the earth's surface.radius of moon-1/4th the radius

of earth.acceleration of moon with respect 2 earth is 0.0027m/sq sec.



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Force on moon =  G M m / D²
m = mass of moon          Me is mass of earth      D = distance between centers
Re = radius of earth        Rm  =  radius of moon

Acceleration (instantaneous) of moon just before striking earth :
     A   =  G Me / (Re + Rm)²  =  16 G Me / 25 R²e

     g = 9.8 m /sec² = G Me / R²e

   A = 16/25 * g = 6.272 m /sec²

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