Aircraft climb when they start flying and decend when they land. This is usually at a very small rate ( to avoid upsetting the passengers). If you are talking about an aircraft landing then 500 feet per minute is about right
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1 foot.
Well the average terminal velocity ofr an average sized jumper is 120mph. I fall at 120mph and fall 10,000 feet in 45/50 seconds so I guess about 213 feet per second.
1 second, since all objects fall at 16 feet per second.
40000 feet = 7.6 miles
About 41 feet per second.