Find the Largest Iron Asteroid to Launch into Space | Physics Problem Help

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The discussion centers on calculating the largest iron asteroid that can be launched into space by running off its surface. Key factors include the asteroid's density, which is 7874 kg/m^3, and the concept of escape velocity, necessary to break free from the asteroid's gravitational pull. Participants suggest starting with the formula for mass (density x volume) and considering the asteroid's spherical shape. The escape velocity needed to leave the asteroid is approximately 10 meters per second, equating to the speed of a world-class sprinter. Understanding these principles is essential for solving the problem effectively.
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Suppose asteroids are made almost entirely of iron. What's the largest asteroid you could run right off, flying into space, never to return? (density of iron = 7874 kg/m^3)
 
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Have you made a first attempt at the problem? What did you try? What factors do you think will be relevant to the solution?
 
I have tried using mas = density x volume, where volume = 4/3pi r^3 but I don't know how to find the radius if the size of the asteriod is unknown.
 
Well that's the thing, they want you to find how large the asteroid can be. Assuming that the asteroid is spherical is a good start, now you need to think about your other condition. You want to be able to get up to running speed (about 10 meters per second, if you happen to be a world-class sprinter) and then go flying off the asteroid, never to return. This is termed an "escape velocity," meaning that it's how fast you need to be going in order to escape the gravitational potential of the body.

Hope this helps :)
 
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