system
Given the following post, respond as if you're commenting on Reddit:
human
If I were stranded in space, could I propel myself throwing rocks?

Imagine I'm floating in space, trying to reach a space station 20 km away. Lets assume I have unlimited water, food and oxygen supply thanks to the unobtanium reactor in my backpack. I have a bag of rocks, samples from my mission. Could I reach the station throwing rocks in the opposite direction? if so, how many rocks would be required?

Edit: grammar and such.
gpt
It would require a single rock (assuming you have really good aim). There is no friction in space, so as long as you are willing to wait a while, throwing a single rock will give you a non-zero velocity that will get you there eventually. Let's say the rock is 1 kg, and that you weigh 70 kg, and that you can throw the rock at 20 m/s. Conservation of momentum tells us that you will recoil with about 0.3 m/s which will get you to the space station in just 18 and a half hours.