# Relationship between planetary mass and gravity formula math

### Gravitational attraction (article) | Forces | Khan Academy

that it overwhelms all the gravity interactions of every other object on the planet . Every object with mass exerts a gravitational force on every other object. . A vector is the difference between two points. Now that we've worked out the math and the code for calculating an attractive force (emulating gravity), we need to. However, at large distances from the Earth, or around other planets or moons, the acceleration is different. The acceleration due to gravity depends on the mass. If the mass of one of the objects is doubled, then the force of gravity between them is doubled. the proportionalities is to express the relationships in the form of an equation . It guides the efforts of scientists in their study of planetary orbits.

- Gravitational attraction
- How do scientists measure or calculate the weight of a planet?
- Acceleration Due to Gravity Formula

However for objects the size of planets or stars, it is of great importance. In order to use gravity to find the mass of a planet, we must somehow measure the strength of its "tug" on another object.

If the planet in question has a moon a natural satellitethen nature has already done the work for us. By observing the time it takes for the satellite to orbit its primary planet, we can utilize Newton's equations to infer what the mass of the planet must be. For planets without observable natural satellites, we must be more clever.

Although Mercury and Venus for example do not have moons, they do exert a small pull on one another, and on the other planets of the solar system. As a result, the planets follow paths that are subtly different than they would be without this perturbing effect.

Although the mathematics is a bit more difficult, and the uncertainties are greater, astronomers can use these small deviations to determine how massive the moonless planets are. Finally, what about those objects such as asteroids, whose masses are so small that they do not measurably perturb the orbits of the other planets? Until recent years, the masses of such objects were simply estimates, based upon the apparent diameters and assumptions about the possible mineral makeup of those bodies.

And then, you know, the extra meter to get to my center of mass, we can ignore for now, because it would be. So it's and soon.

**To Calculate The force of gravitation between Earth and sun**

I'll write it in scientific notation since everything else is in scientific notation-- 6. So let's write that down. So the distance is going to be 6. We have to square that. Remember, it's distance squared.

### Relationship Between Gravity & the Mass of the Planets or Stars | Sciencing

So let's see if we can simplify this a little bit. Let's just multiply those top numbers first. Force is equal to-- let's bring the variable out. Mass of Sal times-- let's do this top part. So we have 6. And I just multiplied this times this, so now I have to multiply the 10's. So 10 to the negative 11th times 10 to the negative 24th. We can just add the exponents.

They have the same base. So what's 24 minus 11? It's 10 to the 13th, right? And then what does the denominator look like? It's going to be the 6. So it's going to be-- whatever this is is going to be like 37 or something-- times-- what's 10 to the sixth squared?

It's 10 to the 12th, right? So let's figure out what 6.

## Newton's Law of Universal Gravitation

This little calculator I have doesn't have squared, so I have to-- so it's And so simplifying it, the force is equal to the mass of Sal times-- let's divide, That's just this divided by this. And then 10 to the 13th divided by 10 to the 12th. Actually no, this isn't 9. Each object has a PVector location: Each object has a numeric mass: There is a numeric variable G for the universal gravitational constant.

Given these assumptions, we want to compute a PVector force, the force of gravity.

We're going to use the same logic here. A vector is the difference between two points. To make a vector that pointed from the circle to the mouse, we simply subtracted one point from another: Now we just need to compute the magnitude and scale the vector accordingly.

A single Mover object. A single Attractor object a new object type that will have a fixed location.

### How do scientists measure or calculate the weight of a planet? - Scientific American

The Mover object will experience a gravitational pull towards the Attractor object, as illustrated in the diagram. We can start by making the new Attractor object very simple—giving it a location and a mass, along with a method to display itself tying mass to size. The last piece of the puzzle is how to get one object to attract the other. How do we get these two objects to talk to each other?