Does Jupiter have less gravity than Earth? PLEASE EXPLAIN HOW?!?=)?

Question

I'm doing a project right now and I know it does, but I need to know how. This is what my research says...Jupiter has only 254% of the gravity on Earth. This is because Jupiter is such a large plant(and the gravitational force a planet exerts upon an object at the plnet';s surface is proportional to it's mass and to the inverse of its radius squared). I need NEED HELP ON UNDERSTANDING THE PARENTHESES PART!!please answer...=(

Answer 1

Earth does have the highest surface gravity of any of the INNER planets, but Jupiter (2.6 g), Neptune (1.14g) and Saturn (1.1g) each have a higher surface gravity than earth.

Answer 2

it boils down to this:

Jupiter has far more mass, but the vast majority of that mass if very far away from you if you are on the surface.

Therefore the gravity is only a little higher

Answer 3

50% = Half gravity

100% = Same gravity

200% = Twice gravity

254% = Two and a Half times more gravity.

Answer 4

jupiters gravity is much higher then earths....

on a side note (you are doing a project, this isn't related to gravity tho) if you were to fly a space ship into jupiter, it would be crushed... infact, it's aboslutely impossible for us to explore the near center of jupiter simply becuase of the enormous surface pressures of jupiter... it would simply be impossible for us to design a ship to withstand these pressures.)

Answer 5

Earths gravity is 100percent Jupiter's is 254percent.That means Jupiter's gravity is 2.54times that of earth.

Even though mass is high,due to less density,the distance to cent re from Surface is more.The gravity reduces due to that.

Answer 6

"Jupiter's mass is about 1.9 x 1027 kg. Although this is 318 times the mass of the Earth, the gravity on Jupiter is only 254% of the gravity on Earth. This is because Jupiter is such a large planet (and the gravitational force a planet exerts upon an object at the planet's surface is proportional to its mass and to the inverse of its radius squared). "

This doesn't mean that Jupiter has less gravity than Earth, it means that Jupiter has less gravity for its size than Earth.  

Jupiter is composed primarily of gases, which have a high volume in relation to their mass.  Earth is composed mostly of rock and metals, which have a low volume in relation to their mass.  So the density of Jupiter is low in comparison to the density of Earth.

Jupiter's density: 1.326 g/cm³

Earth's density:    5.515 g/cm³  

Density, is a quantitative expression of the amount of mass contained per unit volume . The standard unit is the kilogram per meter cubed (kg/m³).

Jupiter's volume is more than 1300 times that of the Earth.

"The weight of an object is the force of gravity on the object and may be defined as the mass times the acceleration of gravity, w = mg. Since the weight is a force, its SI unit is the newton. Density is mass/volume."

Answer 7

Jupiter's mass is much more than 2.54 times Earth's.  Jupiter doesn't have a solid surface, but if you use the top of the clouds as a "surface", you would weigh 2.54 times more than you do on Earth.  The Earth is pretty dense.  It has a core of iron.  So, it's surface is pretty close to the core.  This gives you a higher surface gravity, because gravity's force is reduced over distance.  While Jupiter has a heavy core, it also has lots of hydrogen gas.  Hydrogen isn't very dense.  So the cloud tops are really quite a distance from the core.  So the "surface gravity" for Jupiter is lower than you might expect.

Answer 8

The amount of gravity any object has is proportional to its mass.  Something with twice as much mass has twice as much gravity.   The FORCE that is exerted on you by a planet is inversely proportional to your distance from its center squared (r*r) times your mass and its mass.  Like this:

F = gravitational constant * mass1 * mass2  /  r ^2

Jupiter weighs 318 times more than Earth.  So why would you only weigh 2.6 times more if you could somehow "stand" on its gassy surface?  The answer is that Jupiter is much bigger.  If Jupiter were the same size as Earth, but still the same mass, you would weigh 318 times more on its surface than you would on Earth.   However, Jupiter is 11 times the diameter of Earth, so gravity is 11*11 times weaker at its surface than it would be if all its mass was crammed into a tiny Earth-sized ball.

So, no, gravity is not "weaker" on Jupiter.

Answer 9

Earth has 100% of the gravity on Earth.

Jupiter has 254% of the gravity on Earth.

254% is greater than 100% - so your question is screwed up or you don't understand percentages.

Answer 10

The force Jupiter Exerts on any body is rightly propotionate to the masses of the two bodies and inversely to the DISTANCE (not Radius of them) between them.

Radius is already used along with their Density in calculating their Mass.

Answer 11

Jupiter has more gravity.

254% is greater than 100%

Answer 12

gravity is a constant.

you are refering to SURFACE GRAVITY

the gravitational force is F(g)=(g*M*m)/(d^2)

so Jupiter has MUCH more mass than the Earth, but also has a much larger volume.   Gravity itself though hasnt changed--just its appearance at the surface of the Planet.

and yes, 254% IS LARGER THAN 100%

Answer 13

NO!!!! jupiter has more gravity than earth, because jupiter has a higher mass, so its gravity is higher

gravity is dependent on mass

Answer 14

In simple terms:

More mass = more gravity

More distance from the center of the planet = less gravity

Now, the sentence also contains indications of the relation ship.

"proportional to it's mass" means:

double mass = double gravity force.

"inverse of its radius squared" means:

If you double the radius, or the distance from center of the planet to your object, the gravity force gets reduced to 25% ( or multiplied by 1/(2*2) = 1/4).

So, jupiter weights about 317 times more than Earth. It's reference surface radius is about 11 times Earths. so Jupiters gravity is about 317/(11*11) times higher than Earth or about 260 % (compare this to the 254% of the accurate calculations)

It's simple. Jupiter weights more, but has also less density - it is just a huge ball of gas and liquid - that's why it's gravity is not 317 times stronger, but only 254 times.

Answer 15

the larger the planet the more gravity it has. as you said Jupiter has 254% of the gravity on earth which means thats 254% more gravity than on earth

Answer 16

No. A planets gravitational attraction is a function of it's mass.

Answer 17

The part in parentheses just means "the larger and more massive a planet is, the more gravity it has".

Answer 18

At a particular distance from a planet (say, 100,000 kilometers, or any other number you might like), the force is proportional to the mass of the planet.  Jupiter's mass is 318 times greater than the Earth, so if you were 100,000 km from Jupiter, you'd feel 318 times more force than if you were 100,000 km from the Earth.

For a particular planet's mass, the gravitational force varies as the inverse square of the distance from the center.  So the force 100,000 km from the planet is 4 times bigger than the force 200,000 km from the planet.  This is true for both the Earth and Jupiter.

force is proportional to [mass of planet/(distance from planet center)^2]

Now, you want to know the surface gravity.  That is to say, the gravitational force at the surface of the planet.

The radius of Jupiter is 11.2 times bigger than the radius of Earth.

So the surface gravity is

318 / (11.2)^2 = 2.54

times bigger than Earth.  As a percentage, that's 254%