# What Happens to the Gravitational Force Between 2 Planets When the Distance Between Them Is Increased to 3 Times Its Previous Value?

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Gravitational force is affected by a number of things, including the mass of a planet. Find out what happens to the gravitational force between two planets when the distance between them is increased to three times its previous value with help from an educational professional in this free video clip.

Part of the Video Series: Moons & Planets
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## Video Transcript

Hi, my name is Eylene Pirez, and I'm an astrophysicist, and this is "what happens to the gravitational force between two planets when the distance between them is increased to three times it's previous value?" So, let's say that the first, let's look at the gravitational force, first. For the first planet, it will be the gravitational constant, G, the mass of the first planet, the mass of the second planet, and the distance, square. And, then, let's say that we increased the distance, but we kept everything else the same, so the mass didn't, the masses didn't change, just the distance increased. So, now, instead of, we'll call this D two, and it's three times D one. Now, let's plug in our force equation. So, we have G M one, the mass of the second planet. And, now, instead of the distance, D one, we have the distance D two, which is three D one, square. So, now, we have one ninth of the original force because we had to square the three of the distance. So, even in one, we just changed the distance size. What it does, drops the gravitate, the gravitational force by the square of that. So, we have one ninth of the force, of the previous force. My name is Eylene Pirez, and I'm an astrophysicist, and this is "what happens to the gravitational force between two planets when the distance changes?"

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