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## Homework Statement

COnsider two identical 1kg blobs of water on opposite sides of the Earth, one on the side facing the moon and the other on the side farthest away from the moon.

a)calculate the gravitational force of the moon on the blob on the side of the earth closest to the moon. (considering that the distance i have for earth to moon is centre to centre.)

b) calculate the force of the moon on the blob on the farthest side away from the moon.

Distance from Earth to moon = 3.84E8

Radius of Earth = 6.37E6

G= 6.67259E-11

Mass of Earth = 5.98E24

mass of Moon = 7.36E22

## Homework Equations

F=G(m1m2)/d^2

## The Attempt at a Solution

seeing how the blobs of water on the surface i assumed i would have to subtract the radius of the earth from the distance to give me a more accurate distance from blob to moon.

3.84E8-6.37E6 = 3.78E8.

now factored that into equation

F=G(m1m2)/d^2

F=6.6725(5.98E24x 7.36E22)/3.78E8^2

F=2.06E20

thats a huge number does that seem correct..

for b) all i changed was the distance which i added the radius of the earth instead which gave 3.9E8

F=1.92E20

i hope this is right....