If Earth's mass not its atmosphere was squeezed to the size of a soccer ball would it still hold it's atmosphere & have same surface gravity?
And if I stood on it could I propel it through space with a handheld laser propulsion gun.
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answers:
aladdinwa say: I don't know about holding the same volume of atmosphere, but the surface gravity would be much, much, much, much, much stronger; because the pull of an oject's gravity gets stronger the closer you get to the center of the object's mass.
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Ronald 7 say: The Gravity would be the same but we would have no place to stand
And nothing would budge it
Besides, how could we play soccer ?
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poldi2 say: Gravity is a function of mass. If the mass doesn't change, the gravity doesn't change.
No, you could not propel it through space with anything.
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daniel g say: Yes, but would turn so hot it would be more a micro star. Gravity would be greater
The size of a tennis ball, maybe a black hole.
A small ball of some awful dense stuff.
>> try your laser thruster on earth as is, it would have more influence with propulsion than something more dense irregardless size.
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Jeffrey K say: Earth would become a neutron star at that density. Almost a black hole. Its surface gravity would be trillions of m/sec^2 and its escape velocity would be almost the speed of light. Air molecules would be pulled down and crushed into neutrons.
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quantumclaustrophobe say: So... if you stood where you are now, and the Earth's surface suddenly left your feet as it crunched down to a soccer ball - you'd weigh the same, as long as you could stay where you are - about 4000 miles from the Earth's center of gravity...
But, if you were to fall to that new surface - about a foot across, or so - your weight would *jump* to many times what it is now.
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Rowan say: It would be a black hole, and so would you.
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nineteenthly say: If it were that small it would be made of neutronium. The surface gravity would be millions of times higher than it currently is. It would indeed retain an atmosphere but it would be compressed to the kind of matter which makes up white dwarf stars.
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D g say: gravity is proportonal to the radius of the obect .. because the mass is considered center in the exact center of the object

so if you take the size of the earth and make it the size of a soccer balls the gravity would be would be considerably larger

F = G M1 m2/r^2

if one of those m is you

g = F/m2 = G * M1/r^2

r^2 = (6.371 x 10^6)^2 for our 9.8 m/s^2 g

if r^2 = (1/4)^2 = 1/16 m^2

gs = Fs/m2 = G*M1/rs^2

gs *rs^2 = g * re^2
gs = g*re^2/rs^2

gs = 9.8* (6.371 x 10^6)^2 / (1/16)

gs = 9.8 * (6.371*10^6)^2 * 16

gs = 156.8 * (6.371)^2 * 10^12 m/s^2

gs = 6364 *10^12 m/s^2
gs = 6.364 x 10^15 m/s ^2

just a tad bit more gravity

if the earth was the same size as 1/2 m ball ..
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say: When you write fiction, you can do whatever you want.
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