- #1

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- 74

- 12

- Homework Statement
- x

- Relevant Equations
- x

Part a) Is fairly trivial, just multiply both the given numbers to find the total change in momentum per second, which by Newtons II/III law is the thrust produced.

Part d) is confusing me a great deal. I agree that pressure/density of air will decrease with altitude, this means that there will be less mass per second pushed by the fan which means there will be less thrust produced at higher altitudes. The question also wants me to explain why this results in a greater max speed, I know that drag is roughly proportional to v^2, so does a smaller thrust(at max speed drag and thrust are equal), not imply a smaller drag, and thus a smaller drag imply a smaller speed?

What am I missing? Thank you so much for helping me!