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How could I calculate the acceleration of an object on the earths surface , say at the equator , from the influence of the moon , when the moon is directly overhead?

I have calculated the force of attraction from the moon to be 1.99 x 10^(20) N.

Now to find the gravitaional acceleration do I use ==> a=F/M

Where big M = mass earth?

I do I use the mass (m) of the moon?

Or is this not the way to calculate it?

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Another attempt of solving this was i used the formula for influence of moon on tides:

a= GMm/(R-r)^(2) - GMm/(R^(2))

and grav acc due to moon is 0.000001131 m/s^(2)

But someone said I should solve it with the above equation?

Help please

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# Gravitational acceleration from moon

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