Anonymous
Anonymous asked in Science & MathematicsPhysics · 9 years ago

# what happens when the moon slowly moves away from the earth? What happens to the gravitational pull?

Relevance

It was closer when the dinosaurs were on the earth. This site tries to explain what changes have happened:

http://wyomingdinosaurs.com/blog/going-back-in-tim...

• What happens when the moon slowly moves away from the earth? What happens to the gravitational pull?

The force which is keeping the moon at a specific distance and a specific velocity, is the Universal force of Gravitational attraction.

Universal gravitational force = (G * M1 * M2) ÷ d^2

G = Universal gravitational constant = 6.67 * 10^-11

M1 = mass of object #1 = mass of Earth = 5.98 * 10^24 kg

M2 = mass of object #2 = mass of Moon = 7.36 * 10^22 kg

d = distance between the centers of mass of the 2 objects

The distance between the moon and the Earth varies from around 356400 km to 406700 km = 3.564 * 10^8 m to 4.067 * 10^8 m.

Universal gravitational force = (6.67 * 10^-11 * 5.98 * 10^24 * 7.36 * 10^22) ÷ d^2

Universal gravitational force = 2.94 * 10^37 ÷ d^2

The gravitational pull is inversely proportional to the square of the distance.

As d increases, the gravitational pull decreases.

If d2 = 1.5 d1, F2 = 1/1.5^2 * F1

F2 = 0.444 * F1

However, to alter the distance the mass of the earth must change and/or the mass of the Earth must change.

OR

A huge object must collide with the Earth or the Moon

To change d, M1 and/or M2 must change/ or the formula is incorrect!

We have sent astronauts to the Moon and we have put satellites in orbit by using this formula.

So, I do not think that the formula is incorrect.

I sleep well because I believe that the Universe is in good hands!

No drastic changes have happened since people have kept written records; and I do not believe any changes will happen today!

• Anonymous
9 years ago

the moon can not move away from the earth and it cant get closer to the earth. it is always orbitting the earth 24/7 some areas of world the gravitational pull is stronger than others. when the moon orbits to a different part of the earth that part will have no gravitational pull to the moon maybe a little depends how far apart

• Anonymous
9 years ago

Well that wont happen for a long time.

If you use the gravitation equation, you eventually learn that if you have 2 masses, and the distance increases, than the pull will become weaker.