How much force to move a planet a planet light speed

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Cull_Obsidian

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As the title says, the question is how much thrust is needed to move an entire planet and then how much is needed to move it light speed

Specifications are a earth sized planet

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Laurus

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A lot.

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Toratorn

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Accelerating something to light speed requires infinite energy, if you want to go by current real life physics.

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Cull_Obsidian

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@toratorn: true, but for example how much force is needed to even move a planet 10mph?

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plotweapon16255

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infinite.

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Cull_Obsidian

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@plotweapon16255: I mean in comics, how much force would the Galactus engine have to produce to make Ego travel at light speed

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ThEBeStOfTheBeST

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@plotweapon16255: I mean in comics, how much force would the Galactus engine have to produce to make Ego travel at light speed

Unquantifiable. And what Tora said.

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plotweapon16255

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@plotweapon16255: I mean in comics, how much force would the Galactus engine have to produce to make Ego travel at light speed

infinite.

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helloman

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A little.

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Darkthunder

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#10  Edited By Darkthunder

Too much

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Au_141

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Battle123axe

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A naval armor piercing round should do it.

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TheDeathstar

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#13  Edited By TheDeathstar

Thinking about Vados moving 6 bigger than Earth Super Dragon Balls at MFTL+ speeds just makes you wonder lmao.

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TheSpartanB345T

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About the amount that MCU Cap puts into a shield throw.

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jaakor

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Simply multiply the mass of the planet with the velocity of light to get a comic perspective. (Assuming infinite energy isn't needed)

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jaakor

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@thedeathstar: she crossed two universes in seconds, MFTL+ is a vast understatement lol

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Cull_Obsidian

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#17  Edited By Cull_Obsidian

@thedeathstar: it certainly does, what i was thinking about was when Thanos fired the interstellar FTL planet moving Galactus engine and withstood the 'kickback' and thrust of it

Now i put it as planetary strength, but a planet traveling at FTL speeds would be ridiculously above planetary strength, just wanted a ballpark figure of where his strength would be

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TheDeathstar

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#18  Edited By TheDeathstar

@jaakor: True. But I think it was few minutes

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Cull_Obsidian

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Aka_aka_aka_ak

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The question makes no sense, force creates acceleration. Technically any positive amount of force could eventually get a planet up to any speed below the speed of light.

Suppose you wanted to move a planet to, as you amended above, 10mph (I'm going to use 10km/h) in, let's say, n seconds. Then it's just Newton's second law. Assuming the planet has the mass of Earth (about 6 x 10^24 kg) then obviously you want an acceleration of 10,000/n ms^-2, so the force is

F=6 x 10^24 x 10^4/n = 6/n x 10^27 N

In general it only makes sense to ask "what force is needed to cause this acceleration" and assuming classical dynamics in a vacuum, you'd then just use Newton's second law: F=ma.

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Cull_Obsidian

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@aka_aka_aka_ak: Thanks very much but what i was referring to was the ftl Galactus engine attached to Ego

But used the Earth as a stand in as we know the dimentions, i specified 10k/h as then we could multiply it to light speed and see what for was required

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TheDeathstar

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Cull_Obsidian

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Anyone else?

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darth_omega_47

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#24  Edited By darth_omega_47

E=mc squared. You have to factor in the mass of both planets, the power you need to move them, and the power you need to approach lightspeed and as well to protect the planets from being torn apart.

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greenroost

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E=mc squared. You have to factor in the mass of both planets, the power you need to move them, and the power you need to approach lightspeed and as well to protect the planets from being torn apart.

this

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MrTrey

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#26  Edited By MrTrey

A normal person can move the earth if they could evenly spread their energy throughout the earth. At something like 100 joules, it'd be 0.000000000005787 meters per seconds/5.787 picometers per second, or 1 meter every 172801105927 seconds or 5479.48712350964 years.

It'd be around 713 teratons of tnt for 1 m/s, around 6-7 times bigger the the dinosaur killer asteroid's impact energy.

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RBT

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@cull_obsidian: How long is it taking for the planet to accelerate from 0 to 10mph? You can't measure force using current speed. You need acceleration. So, say, if it took 10 seconds for the planet to accelerate from 0 to 10mph and then the speed became constant, then the force required would be- 2.67*10^21 kN, assuming the mass of planet equals to that of earth.

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Cull_Obsidian

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@rbt: It was hypothetical, my point and question was basically how m7ch force to accelerate the earth to lught speed roughly, i knoww its not possible, bur wanted a rough estimate on the force someone would have to countwract to stop that planet m9ving if its in light speed