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Name: Ian
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Question:
If outer space is a vacuum where there is no resistance how can a vehicle adjust its course as there is nothing for the boosters to push against?



Replies:
Ian,

there is no need for the boosters to have something outside the motor to push against. What they are pushing against is their own fuel. By accelerating their fuel as quickly as possible out the rear of the engine, Newton's second law is invoked, and the engine pushes itself the other way.

Ryan Belscamper



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