Why does a stream change trajectory?

AI Thread Summary
Streams change trajectory due to the principles of Newton's third law and conservation of momentum. When a force is applied, such as water being expelled from a hose, it creates an equal and opposite reaction that alters the stream's path. This phenomenon is significant enough to be considered in space travel, as even minor trajectory changes can impact navigation. The discussion highlights the importance of understanding these forces in both everyday scenarios and complex situations like space missions. Overall, the mechanics of fluid dynamics and physics play a crucial role in how streams behave.
Bboy Physics
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Okay bear with me here because this might get disgusting. But I was watching Henry's video on how astronauts went to the bathroom in space, and basically they did it in a bag, and shot the bag outside into outerspace. And then he mentioned that the trajectory would change(but extremely small yet significant enough to tell Hudson Control when you're flying to the moon). I realize that streams change trajectory(comedy in firing an extremely high powered hose), but what is this force called?
 
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You could call it the reaction (force). It is a consequence of Newton's third law, or, in a more modern perspective, of conservation of momentum.
 

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